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Basic statistics and Graphs

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2. The Degree of Reading Power (DRP) test is often used to measure the reading ability of children. Here are the DRP scores of 44 third-grade students, measured during research on ways to improve reading performance:
40, 26, 39, 14, 42, 18, 25, 43, 46, 27, 19, 47, 19, 26, 35, 34, 15, 44, 40, 38, 31, 46, 52, 25, 35, 35, 33, 29, 34, 41, 49, 28 52, 47, 35, 48, 22, 33, 41, 51, 14, 54, 45.
Make a histogram using Microsoft Excel. Then do a stemplot. Which graph would you prefer and why? Describe the main features of the distribution.
3. Here's the distribution of marital status for all Americans age 18 and over:
Marital Status Count (millions) Percent
Never married 43.9 22.9
Married 116.7 60.9
Widowed 13.4 7.0
Divorced 17.6 9.2
a. Make a bar graph of the given data set.
b. Make a pie chart of the given data set.
c. Compare both graphs and interpret your result

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Solution Preview

Stem &Leaf
Frequency Stem Leaf
6 1 4 4 5 8 9 9
8 2 2 5 5 6 6 7 8 9
11 3 1 3 3 4 4 5 5 5 5 8 9
14 4 0 0 1 1 2 3 4 5 6 6 7 7 8 9
4 5 1 2 2 4
43
The histogram and Stem & Leaf plot gives and idea about the distribution of DRP scores. The distribution is more or ...

Solution Summary

Step by step method for computing test Basic statistics and Graphs given in the answer.

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