a. A statistics practitioner randomly sampled 100 observations from a population with a standard deviation of 5 and found that x is 10. Estimate the population mean with 90% confidence.

Question

a.	A statistics practitioner randomly sampled 100 observations from a population with a standard deviation of 5 and found that x is 10. Estimate the population mean with 90% confidence.

MathGuru · Answer

Formula: CI90 = mean + or - 1.645(sd/√n) sd = standard deviation n = sample size Substitute the values from your problem into the formula and calculate.