1. Section 7.2
Sig level Tails z-critical µ sample mean s n
0.1 Left -1.28 8.5 8.2 0.5 35
Sig level Tails z-critical µ sample mean s n
0.06 Right 1.55 35 36 4 100
Sig level Tails z-critical µ sample mean s n
0.05 Two 1.96 80 83 35 42
z-critical
-1.96
Section 7.3
Sig level Tails t-critical µ sample mean s n
0.05 Left -1.729 40.3 34 11 20
Sig level Tails t-critical µ sample mean s n
0.05 Right 1.833 8.7 9.3 0.04 10
Sig level Tails t-critical µ sample mean s n
0.05 Two 2.069 38 28 9 24
t-critical
-2.069
Section 7.4
Sig level Tails z-critical p q p^ n
0.01 Left -2.33 0.2 0.8 0.15 100
Sig level Tails z-critical p q p^ n
0.01 Right 2.33 0.02 0.98 0.22 200
Sig level Tails z-critical p q p^ n
0.05 Two 1.96 0.3 0.7 0.34 500
z-critical
-1.96
Section 7.5-Given Variance
Level of Significance Sample Size Degree of FreedomCritical Score Pop Var Sample Var
Right Tail 0.1 10 9 14.68 0.4 0.75
Left Tail 0.05 24 23 13.09 3.5 3.42
Two-tail 0.05 18 17 30.19 0.52 0.51
0.05 18 17 7.56
Section 7.5-Given Standard Deviation
Level of Significance Sample Size Degree of FreedomCritical Score Pop St. Dev Sample St. Dev
Right Tail 0.05 51 50 67.5 0.58 0.38
Left Tail 0.01 9 8 1.65 3.7 3
Two-tail 0.05 20 19 32.85
0.05 20 19 8.91

2. z
-3.55
z
2.50
z
0.56
t
-2.561
t
47.434
t
-5.443
z
-1.25
z
20.20
z
2.15
45018
34952
85517
Test 45553
16.88 41900
22.47 76384
16.61 48862
37615
61104
96710
97875
68245
39945
53582
Test 65252
21.46 72522
5.26
#DIV/0! 20663
426959245

3. 643
640
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641
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637
646
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633
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638
632
634
644
635
637
632
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640
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4.43