Operation Manual

Chapter 13: Inferential Statistics and Distributions 222
Chapter 13:
Inferential Statistics and Distributions
Getting Started: Mean Height of a Population
Getting Started is a fast-paced introduction. Read the chapter for details.
Suppose you want to estimate the mean height of a population of women given the random sample
below. Because heights among a biological population tend to be normally distributed, a t distribution
confidence interval can be used when estimating the mean. The 10 height values below are the first 10
of 90 values, randomly generated from a normally distributed population with an assumed mean of
165.1 centimeters and a standard deviation of 6.35 centimeters (randNorm(165.1,6.35,90) with a seed
of 789).
Height (in centimeters) of Each of 10 Women
169.43 168.33 159.55 169.97 159.79 181.42 171.17 162.04 167.15 159.53
1. Press … 5: SetupEditor. Enter the letters
[H] [G]
[H] [T].
2. Press Í to create the list to store the women’s
height data.
Note: Your SetupEditor will be displayed with no
list name sets (L1 through L6).
3. Press … 1: Edit.
4. Press † to move the cursor into the first row of the
list.
HGHT(1)= is displayed on the bottom line. Press
Í.
5. Press
169 Ë 43 to enter the first height value. As
you enter it, it is displayed on the bottom line.
6. Press Í. The value is displayed in the first row,
and the rectangular cursor moves to the next row.
Enter the other nine height values the same way.