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