Mathematics homework help>Statistics homework help

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Math: Introduction to Probability and Statistics Project
Please visit the website https://vincentarelbundock.github.io/Rdatasets/datasets.html. Each row of this table corresponds to a dataset. For this project, you will perform some basic statistical analysis on one dataset of your choice. Try to find a dataset that interests you and has at least 30 rows. Browse the titles and read the descriptions in the DOC files to understand what the data is and how it was collected. In the DOC file, read the section labelled Format to see what sort of data is recorded and what units are used. Most datasets have lots of different measurements (columns), and you will need to pick one to focus on. Once you have selected a dataset and a column within that data set, click on the CSV file. Open this file with any spreadsheet program/app (Microsoft Excel, Mac Numbers, Google Sheets, etc). The numbers of rows (minus the header row) is the sample size. The column that you selected contains all of the sample measurements. Use these sample measurements to answer the following questions.
Please when you answer, put the link to the CSV file you used.

  1. What is the title of the dataset you have selected?
  2. What is the measurement (column) you have selected, and what is the unit for this measurement?
  3. What is the sample size n? That is, how many rows does your dataset have (not counting the header row)? Note: you must select a dataset with n ≥ 30.
  4. What is the sample mean x?1
  5. What is the sample standard deviation s?2
  6. Approximately what kind of distribution does the random variable x have, and why? What is the name of the theorem that tells you so?
  7. Estimate the population mean μ in two ways.
    (a) Give a point estimate for μ and a “margin of error”. (b) Construct a 99% confidence interval for μ.

_________________________________________________________________________________
1Probably your dataset is very large and calculating x by hand is not practical. The spreadsheet program you are using can calculate this very easily. Click in any empty cell and type ”=AVERAGE(”, then highlight all the measurements in the sample, i.e. the entire column of measurements you are studying. Once all of the sample measurements are highlighted, type ”)” and hit ENTER/RETURN. If this does not work, just google it, e.g. ”how to calculate average in excel”.
2Again, the spreadsheet program you are using can calculate this very easily. Click in any empty cell and type ”=STDEV(”, then highlight all the measurements in the sample, i.e. the entire column of measurements you are studying. Once all of the sample measurements are highlighted, type ”)” and hit ENTER/RETURN. If this does not work, just google it, e.g. ”how to calculate sample standard deviation in excel”.

Statistics homework help

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statistics
the assignment is attached.
There is often the requirement to evaluate descriptive statistics for data within the organization or for health care information. Every year the National Cancer Institute collects and publishes data based on patient demographics. Understanding differences between the groups based upon the collected data often informs health care professionals towards research, treatment options, or patient education.
Using the data on the “National Cancer Institute Data” Excel spreadsheet, calculate the descriptive statistics indicated below for each of the Race/Ethnicity groups. Refer to your textbook and the Topic Materials, as needed, for assistance in with creating Excel formulas.
Provide the following descriptive statistics:
1. Measures of Central Tendency: Mean, Median, and Mode
2. Measures of Variation: Variance, Standard Deviation, and Range (a formula is not needed for Range).
3. Once the data is calculated, provide a 150-250 word analysis of the descriptive statistics on the spreadsheet. This should include differences and health outcomes between groups.
APA style is not required, but solid academic writing is expected.
This assignment uses a rubric. Please review the rubric prior to beginning the assignment to become familiar with the expectations for successful completion.
You are not required to submit this assignment to LopesWrite.

Statistics homework help

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discussionurgent
 
During the recent election season, you saw many instances where polls were taken and reported, along with the confidence level of the estimate. For example, a poll showed that one candidate had a “”voting for” level of 37%+/-4. The opposing candidate had a score of 39%+/-4 at a 95% confidence level. Because the poll is not a census sample, a sample may be “good” but will have variation around the TRUE population proportion or mean. Thus, the poll is an estimate. The +/- value establishes a range within which the true population proportion is said to be, give a certain level of confidence.
However, the reporter said that the second candidate had “a slight lead”. Is this a true statement? Why could it be argued that the scores are “statistically the same”?

Statistics homework help

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discussionstatistics
 
Due Thursday 
Hypothesis testing allows us to use an analytical process to determine if a hypothesis is retained OR rejected. This process compares a null hypothesis (HO), which states things as we believe they are, to an alternative hypothesis (HA), which proposes a change to what we believe exists.
Respond to the following in a minimum of 175 words:

  • Discuss the concepts of hypothesis testing, including what you are evaluating, when it should be used, and the differences between a one- and a two-tailed test.
  • Describe an example from your own personal or professional experiences where you could apply a hypothesis test, and discuss how knowing that information helped you.

Statistics homework help

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urgent

Week 7 Discussion: Rejection Region

Required Resources
Read/review the following resources for this activity:

  • Textbook: Chapter 9 (All Sections)
  • Lesson
  • Minimum of 1 scholarly source

EBOOK: OpenStax, Introductory Statistics. OpenStax CNX. Aug 23, 2019
https://openstax.org/books/introductory-statistics/pages/1-introduction
Initial Post Instructions
After reviewing data from a sample, an inference can be made about the population. For example,
Find a data set on the internet. Some suggested search terms: Free Data Sets, Medical Data Sets, Education Data Sets.

  1. Introduce your Data Set and Cite the Source.
  2. What trends do you notice in your data set?
  3. Based on the trends and the history of your data set, make a claim. What kind of test (left, right, two-tailed) would you have to complete?
  4. Explain the steps needed to complete the Hypothesis Test. What is needed?

Follow-Up Post Instructions
Respond to at least two peers or one peer and the instructor. Further the dialogue by providing more information and clarification.

  1. Based on the claim presented by your peer, state the null and alternative hypothesis and the process you would take to determine if you would Reject or Fail to Reject Ho.
  2. Based on the data and history presented by your peer, state a new claim, and explain why you think your claim is valid.

Writing Requirements

  • APA format for in-text citations and list of references

Criteria
Initial Post Content: Addresses all aspects of the initial discussion question(s), applying experiences, knowledge, and understanding regarding all weekly concepts.
Evidence & Sources: Integrates evidence to support discussion from assigned readings** OR online lessons, AND at least one outside scholarly source.*** Sources are credited.*
Professional Communication: Presents information using clear and concise language in an organized manner (minimal errors in English grammar, spelling, syntax, and punctuation).
Notes
Credited means stating where the information came from (specific article, text, or lesson). Examples: our text discusses…., The information from our lesson states…, Smith (2010) claimed that…, Mary Manners (personal communication, November 2017)…
**Assigned readings are those listed on the syllabus or assignments page as required reading. This may include text readings, required articles, or required websites.
***Scholarly source – per APA Guidelines, only scholarly sources should be used in assignments. These include peer-reviewed publications, government reports, or sources written by a professional or scholar in the field. Wikipedia, Wikis, .com websites or blogs should not be used as anyone can add information to these sites. For the discussions, reputable internet sources such as websites by government agencies (.gov) and respected organizations (.org) can be counted as scholarly sources. Outside sources do not include assigned required readings.

Statistics homework help

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Urgeurgent

Week 7 Assignment: Course Project Part II

COURSE PROJECT PART I UPLOADED BELOW
EBOOK: OpenStax, Introductory Statistics. OpenStax CNX. Aug 23, 2019
https://openstax.org/books/introductory-statistics/pages/1-introduction
Week 7 Project
Hypothesis Testing is the use of statistics to determine the probability that a given claim is true.
In Part II of this project, you will choose a data set, review claims and perform hypothesis testing and make a decision. You will then complete a write-up that includes the calculations.
The government logs the number of documented births, deaths, marriages and divorces however it is possible to have undocumented cases. In part II of this project, you are going to test claims about total births, deaths, marriages and divorces.

  1. Choose a Data Set.
  2. Go to https://www.cdc.gov/nchs/products/nvsr.htm (Links to an external site.)
  3. In the search bar type: Births, Marriages, Divorces, and Deaths
    screenshot of CDC website toolbar
  4. Pick a DataSet and download the PDF document and make note of the volume, number, and date.  For example,
    screenshot of National Vital Statistics Reports webpage
  5. Pick the same month/year combination for each data set. For example, choosing September of 2009.
    screenshot of example dataset
  6. Preliminary Calculations
  7. Create a summary table for 1. Live Births, 2. Deaths, 3. Marriages, and 4. Divorces highlighting the mean, median, sample/population standard deviation, n = number of states that submitted data for each the data sets. You will have FOUR tables using the list of values of each state, the District of Columbia and Puerto Rico (You could have 52 numbers for each data set. You may have less data numbers if not all states/territories submitted data values.)

Summary Table for _________Mean Median Standard Deviation n (Number of States who submitted Data)

  1. Hypothesis Testing

With the information that you gather from the summary tables, test the following (you can use excel when appropriate):

  1. Determine if there is sufficient evidence to conclude the average amount of births is over 5000 in the United States and territories at the 0.05 level of significance.
  2. Determine if there is sufficient evidence to conclude the average amount of deaths is equal to 6000 in the United States and territories at the 0.10 level of significance.
  3. Determine if there is sufficient evidence to conclude the average amount of marriages is greater or equal to 2500 in the United States and territories at the .05 level of significance.
  4. Determine if there is sufficient evidence to conclude the average amount of divorces is less than or equal to 4000 in the United States and territories at the 0.10 level of significance.

For each of the tests above, in your report, be sure to—

  1. Clearly state a null and alternative hypothesis
  2. Give the value of the test statistic
  3. Report the P-Value
  4. Clearly state your conclusion (Reject the Null or Fail to Reject the Null)
  5. Explain what your conclusion means in context of the data.

4. Make your OWN Claim (You are completing ONE more Hypothesis Test)
Lastly, propose and conduct your own test of hypothesis.
a) Pick one data set: Births, Deaths, Marriages OR Divorces.
b) Write a claim about the data set.
c) For your claim—

  1. Clearly state a null and alternative hypothesis
  2. Give the value of the test statistic
  3. Report the P-Value
  4. Clearly state your conclusion (Reject the Null or Fail to Reject the Null)
  5. Explain what your conclusion means in context of the data.

Criteria
Choose a Data Set & Preliminary Data: Proficient. Student computes all 4 Preliminary Data Values.
Hypothesis Testing: Proficient. Completes 4 Hypothesis Tests highlighting the null/alternate hypothesis, value of test statistic, and report p-value.
Hypothesis Testing Analysis: Proficient. State correct conclusion (Reject/Fail to Reject) and valid explanations in context of the data for ALL 4 Problems.
Proposal and computations for new hypothesis test: Proficient. Student creates an original Hypothesis Test based on one of the data sets highlighting the null/alternate hypothesis, value of test statistic, report p-value, conclusion, and explanation.

Research project Statistic

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STA2023
Research Project
 
Instructions: Choose one of the following research questions below to address for your project. You can work on your project individually or in a team (no more than 3). You will use the student data file that you have already worked with for CT assignments # 1 and #2. Follow the outline of the example of the completed project that is provided. In other words, you will formulate hypotheses for each of the sub-questions and then show the results addressing each hypothesis. The Due date for your completed project is Dec 02 @12:30PM.
 
Research questions pertaining to student survey
1. Is there a difference in GPA by gender? In other words, who has the higher GPA male students or female students?
a. Do female students experience more anxiety in taking statistics than male students?
b. Do female students perceive statistics to be more difficult than male students?
c. Do female students work more hours on their jobs than male students?
d. Do female students spend more hours on their homework than male students?
 
2. Is there a difference in GPA by race? In other words, who has the highest GPA among Black, Hispanic, White and Other students?
a. Which group experiences the most anxiety in taking statistics?
b. Which group perceive statistics to be the most difficult?
c. Which group has completed the most credit hours?
d. Which group spends the most time on their homework?
 
3. Does employment affects a student’s GPA? In other words, who has the higher GPA students who are employed or students who are not employed?
a. Do employed students experience more anxiety in taking statistics?
b. Do employed students perceive statistics to be more difficult?
c. Which group has completed more credit hours, students who are employed or those who are not employed?
d. Which group spends more time on their homework, students who are employed or those who are not employed?
 
4. Is there a difference in GPA between students who attended high school in a foreign country and those who attended high school in the USA?
a. Do students who attended high school in a foreign country experience more anxiety in taking statistics than students who attended high school in the USA?
b. Do students who attended high school in a foreign country perceive statistics to be more difficult than students who attended high school in the USA?
c. Which group has completed more credit hours, students who attended high school in a foreign country or students who attended high school in the USA?
d. Which group spends more time on their homework? Students who attended high school in a foreign country or students who attended high school in the USA?
 
5. Is there a difference in GPA between students who are the first in their family to attend college and those who are not?
a. Do students who are the first in their family to attend college experience more anxiety in taking statistics than students who are not the first in their family to attend college?
b. Do students who are the first in their family to attend college perceive statistics to be more difficult than students who are not the first in their family to attend college?
c. Which group has completed more credit hours, students who are the first in their family to attend college or those who are not the first in their family to attend college?
d. Which group spends more time on their homework? Students who attended high school in a foreign country or students who attended high school in the USA?
 
6. Is there a difference in GPA between students who are taking online courses this semester and those who are not?
a. Do students who are taking online courses experience more anxiety in taking statistics than students who are not taking any online courses?
b. Do students who are taking online courses perceive statistics to be more difficult than students who are not taking any online courses?
c. Which group has completed more credit hours, students who are taking online courses this semester or those who are not taking any online courses this semester?
d. Which group spends more time on their homework, students who are taking online courses this semester or those who are not taking any online courses this semester?
 
7. Is there a difference in GPA by age? Who has a higher, GPA students younger than 20, those between the ages of 20 – 30, or those over 30 years old?
a. Which group experiences the most anxiety in taking statistics, those younger than 20, those between the ages of 20 – 30, or those over 30 years old?
b. Which group perceives statistics to be the most difficult, those younger than 20, those between the ages of 20 – 30, or those over 30 years old?
c. Which group has completed the most credit hours, those younger than 20, those between the ages of 20 – 30, or those over 30 years old?
d. Which group spends the most time on their homework, those younger than 20, those between the ages of 20 – 30, or those over 30 years old?

Statistics homework help

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Statistics homework help

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Before beginning work on this week’s discussion post, review the following resources:

From the below list, select one topic for which you will lead the discussion in the forum this week. Early in the week, reserve your selected topic by posting your response (reservation post) to the Discussion Area, identifying key words about your topic in the subject line.
By the due date assigned, research your topic and start a scholarly conversation as you respond with your initial or primary post to your own reservation post in the Discussion Area. Make sure your response does not duplicate your colleagues’ responses:
Topic:

  • Assess the difference between independent and dependent samples with examples.

As the beginning of a scholarly conversation, your initial post should be:

  • Succinct—no more than 500 words.
  • Provocative—use concepts and combinations of concepts from the readings to propose relationships, causes, and/or consequences that inspire others to engage (inquire, learn). In other words, take a scholarly stand.
  • Supported—scholarly conversations are more than opinions. Ideas, statements, and conclusions are supported by clear research and citations from course materials as well as other credible, peer-reviewed resources.