# Question

Refer to Example 8.1 on page 167, and the corresponding Figure 8.3 showing the distribution of heights for college women. The mean of the heights is 64.5 inches, and the standard deviation is 2.5 inches.

a. Use the Empirical Rule to determine the ranges into which about 68%, 95%, and 99.7% of college women’s heights should fall.

b. Draw a picture illustrating the ranges you found in part (a), indicating the cutoff points for the middle 68%, 95%, and 99.7% of heights of college women.

c. The table below (top of next page) shows some ranges of heights and the number of women out of the 94 in the sample whose heights fell into these ranges. Compare these 94 women to what would be expected if the Empirical Rule held exactly, using the intervals found in part (a).

a. Use the Empirical Rule to determine the ranges into which about 68%, 95%, and 99.7% of college women’s heights should fall.

b. Draw a picture illustrating the ranges you found in part (a), indicating the cutoff points for the middle 68%, 95%, and 99.7% of heights of college women.

c. The table below (top of next page) shows some ranges of heights and the number of women out of the 94 in the sample whose heights fell into these ranges. Compare these 94 women to what would be expected if the Empirical Rule held exactly, using the intervals found in part (a).

## Answer to relevant Questions

Using Table 8.1, a computer, or a calculator, determines the percentage of the population falling above each of the following standard scores: a. 1.28 b. 20.25 c. 2.33 The 84th percentile for the Stanford-Binet IQ test is 115. (Recall that the mean is 100 and the standard deviation is 15.) a. Verify that this is true by computing the standardized score and using Table 8.1. b. Draw pictures ...For each of the time series in Exercise 15, explain whether there is likely to be a seasonal component. Give the name of a type of statistical picture that could be used for each of the following kinds of data: a. One categorical variable b. One measurement variable c. Two categorical variables d. Two measurement variables Find some data that represent change over time for a topic of interest to you. Present a line graph of the data in the best possible format. Explain what you have done to make sure the picture is as useful as possible.Post your question

0