You measure 27 textbooks' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 8.7 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight. Give your answers as decimals, to two places < μ μ < License
Solution :
Given that,
Sample size = n = 27
Z/2 = 1.96
Margin of error = E = Z/2* ( /n)
= 1.96 * (8.7 / 27)
Margin of error = E = 3.28
At 95% confidence interval estimate of the population mean is,
- E < < + E
31 - 3.28 < < 31 + 3.28
27.72 < < 34.28
You measure 27 textbooks' weights, and find they have a mean weight of 31 ounces. Assume...
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