13–2 Inferential Statistics and Distributions
8250FC~1.DOC TI-83 international English Bob Fedorisko Revised: 10/26/05 1:39 PM Printed: 10/27/05 2:57
PM Page 2 of 36
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 cm.
and a standard deviation of 6.35 cm. (
randNorm(165.1,6.35,90) with a seed of 789).
Height (in cm.) 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 … Í to display the stat list
editor.
Press } to move the cursor onto
L1, and then
ress y [INS]. The Name= prompt is
displayed on the bottom line. The
Ø
ØØ
Ø curso
indicates that alpha-lock is on. The existing
list name columns shift to the right.
Note: Your stat editor may not look like the one
pictured here, depending on the lists you have
already stored.
2. Enter [H] [G] [H] [T] at the Name= prompt, and
then press Í. The list to which you will
store the women’s height data is created.
Press † to move the cursor onto the first row
of the list.
HGHT(1)= is displayed on the bottom
line.
3. Press 169 Ë 43 to enter the first height value.
As you enter it, it is displayed on the bottom
line.
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.
Getting Started: Mean Height of a Population
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