Texas Instruments TI-83 Plus Manual page 67

Exercises
1. Given the following sample data from two populations, find a 95% confidence interval for
µ − µ :
1 2
2. Given the following paired data, test at a 5% significance level whether or not µ
3. Given the following sample data, test at a 5% significance level whether or not p
4. Given the following sample data, test at a 5% significance level whether or not µ
5. Given the following sample data, find a 90% confidence interval for p1−p2.
6. Given the following paired data, find a 99% confidence interval for µ1−µ2.
= 23.5 = 17.9
Ë Ë
1 2
s = 5.1 s = 2.4
1 2
n = 38 n = 59
1 2
x y
13 43
32 92
12 74
14 77
35 71
= 23% = 37%
ê ê
1 2
n = 89 n = 143
1 2
= 47 = 39
Ë Ë
1 2
s = 0.2 s = 0.1
1 2
n = 66 n = 34
1 2
= 74% = 65%
ê ê
1 2
n = 200 n = 195
1 2
x y
31 34
23 29
21 47
41 77
53 17
67
= µ .
1 2
< p .
1 2
> µ .
1 2