Sample size, n = 92
= 25.9
s = 2.4
Confidence interval, CI = Z*
a) For 95% confidence level, Z* = 1.96
CI = 25.9 1.96 x
= 25.9 0.49
= (25.41, 26.39)
b) For 90% confidence level, Z* = 1.645
CI = 25.9 1.645 x
= 25.9 0.41
= (25.49, 26.31)
c) For 99% confidence level, Z* = 2.576
CI = 25.9 2.576 x
= 25.9 0.64
= (25.26, 26.54)
part B & C? Question Help % 7.2.10 A random sample of 92 observations produced a...
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