Asked by Tina
For sample mean x = 150, sample size n = 36 and sample standard deviation s = 40 find 80% confidence interval for population mean. Population standard deviation is not known
Answers
Answered by
MathGuru
CI80 = mean ± 1.28(sd/√n)
mean = 150
sd = 40
n = 36
Calculate your interval using the above formula.
mean = 150
sd = 40
n = 36
Calculate your interval using the above formula.
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