Question

22. Use a statistical calculator to check the results for , o, and s in the following: a. Exercise 16 d. Exercise 21.

16

21

Answer 1

Exercise 16.

Mean is calculated as

$\bar{X} = \frac{X1+X2+X3+X4}{n}=\frac{2.4+....+1.2}{4}=1.5$

Sample standard deviation calculated as

$S = \frac{\sum (\bar{X}-X_{i})}{n-1}$

=0.68313

Population standard deviation is calculated as

$\sigma = \frac{\sum (\bar{X}-X_{i})}{n}$

=0.5916

Exercise 18

Again

Mean is calculated as

$\bar{X} = \frac{X1+X2+X3+X4}{n}=\frac{5.8+....+7.8}{5}=6.5$

Sample standard deviation calculated as

$S= \frac{\sum (\bar{X}-X_{i})}{n-1}$

=1.063

Population standard deviation is calculated as

$\sigma = \frac{\sum (\bar{X}-X_{i})}{n}$

=0.9508