Exercise 13.2: Frequency Distribution for Ratio Level Data

Look over the frequency distribution for the percentage of residents 65 years of age or older in U.S. Congressional Districts in Table 13.3E and answer the following questions.



1. What is the mode of the distribution?

2. What is the median of the distribution?

3. The mean of the distribution is 12.7 and the standard deviation is 3.5. Describe in plain English how and why these two numbers describe this distribution.

4. Calculate the variance of the distribution.

5. What is the interquartile range of the distribution?

1. What is the mode of the distribution? 2. What is the median of the distribution? 3. The mean of the distribution is 12.7 and the standard deviation is 3.5. Describe in plain English how and why these two numbers describe this distribution. 4. Calculate the variance of the distribution. 5. What is the interquartile range of the distribution?