Question

you measure 27 watermelons' weights, and find they have a mean weight of 74 ounces. assume the population atandard deviation is 8.2 ounces. based on tbus, what is the macimal margin of error associated with a 90% confidence interval for the true population mean watermelon weight.

(in ounces, 2 decimal places)

Answer 1

Given that, sample size (n) = 27, sample mean = 74 ounces

and population standard deviation = 8.2 ounces

A 90% confidence level has significance level of 0.10 and critical value is,

The margin of error (E) is,

Therefore, the margin of error associated with a 90% confidence interval for the true population mean watermelon weight is 2.60 ounces.

The 90% confidence interval for the population mean is,