Chapter 3, Problem 1CQQ

To determine

Find the mean hours slept by the subjects in the preceding night.

Answer to Problem 1CQQ

The mean hours slept by the subjects in the preceding night is 6.75 hours.

Explanation of Solution

The formula for mean is given below:

$\overline{x}=\frac{{\displaystyle \sum x}}{n}$

Step-by-step procedure to find the descriptive statistics using the TI-83/84 Plus calculator:

• Turn on the graphing calculator.
• Press ‘STAT’, ‘1’, and ‘ENTER’ keys.
• Enter the first data value and press ‘ENTER’.
• Repeat the same step for second, third, and so on.
• Press ‘2nd’and ‘MODE’ keys.
• Press ‘STAT’ keys.
• Use arrow keys to highlight CALC and 1-Var Stats and press ‘ENTER’ key.

Output obtained using the TI-83/84 Plus calculator is as follows:

Thus, the mean hours slept by the subjects in the preceding night is 6.75 hours.