250 Chapter 7: Parameter Estimation
The 95% confidence interval for the mean is (60.865, 77.6683)
Confidence Interval: Unknown Variance
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(a)
One-Sided
Two-Sided
Upper
Lower
Enter the value of a:
(0 < a < 1)
.05
Data value = 77 54
63
58
72
49
92
70
Sample size = 15
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The 95% lower confidence interval for the mean is (-infinity, 76.1662)
Confidence Interval: Unknown Variance
Start
Quit
(b)
One-Sided
Two-Sided
Upper
Lower
Enter the value of a:
(0 < a < 1)
.05
Data value = 77 54
63
58
72
49
92
70
Sample size = 15
Add This Point To List
Remove Selected Point From List
Data Values
Clear List
FIGURE 7.3 (a) Two-sided and (b) lower 95 percent confidence intervals for Example 7.3f.