Mathematics Homework Help

Review of Central Tendency and other topics

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Purpose: To reinforce student’s understanding and application of descriptive statistics, histograms, and skewness.

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1. Using the data below, answer the questions that follow

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4, 17, 9, 10, 3, 14, 13, 12, 15, 3, 8, 10, 4, 15, 14, 4, 19, 10, 11, 12, 15

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1. Draw a histogram (be sure your axes are properly labeled).

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The first step to draw a histogram is to find the class boundaries, in this case due to the size of the data set, 5 classes will be enough.

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We start by finding the range which is:

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But to make it look nicer we will use a Range of 0 to 20 and 5 classes

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Now we can find the classes, we start with the min and we add the class size until we reach the max.

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Calculations	Class	Freq.
0+4=4	0 to 4	2
4+4=8	4 to 8	3
8+4=12	8 to 12	6
12+4=16	12 to 16	8
16+4=20	16 to 20	2

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With this information we can plot the following graph.