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