# Question

Find the variance and standard deviation for the two distributions in Exercises 8 and 18 in Section 2–2. Compare the variation of the data sets. Decide if one data set is more variable than the other.

Find the variance and standard deviation.

Find the variance and standard deviation.

## Answer to relevant Questions

This frequency distribution represents the data obtained from a sample of word processor repairers. The values are the days between service calls on 80 machines. Class boundaries Frequency 25.5–28.5 ...Using Chebyshev’s theorem, solve these problems for a distribution with a mean of 80 and a standard deviation of 10. a. At least what percentage of values will fall between 60 and 100? 75% b. At least what percentage of ...The average of the number of trials it took a sample of mice to learn to traverse a maze was 12. The standard deviation was 3. Using Chebyshev’s theorem, find the minimum percentage of data values that will fall in the ...The mean deviation is found by using this formula: where X = value = mean n = number of values | | = absolute value Find the mean deviation for these data. 5, 9, 10, 11, 11, 12, 15, 18, 20, 22 The average teacher’s salary in a particular state is $54,166. If the standard deviation is $10,200, find the salaries corresponding to the following z scores. a. 2 b. – 1 c. 0 d. 2.5 e. –1.6Post your question

0