# Sample Mean for a Normal Population

A random sample is selected from a normal population. The population mean is ?=60 and the population standard deviation is ?=15. After a treatment is given to the members of the sample, the sample mean is M=65. The sample size is n=25.

The hypothesis test:

H0: ?=60

H1: ?= <>60

?=0.05

Give reason why or why not the sample mean is sufficient to conclude that the treatment has a significant effect.

https://brainmass.com/statistics/hypothesis-testing/sample-mean-normal-population-488572

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Statistics confusion

A random sample is selected from a normal population. The population mean is ?=60 and the population standard deviation is ?=15. After a treatment is given to the members of the sample, the sample mean is M=65. The sample size is n=25.

The hypothesis test:

H0: ?=60

H1: ?= <>60

?=0.05

Give reason why ...

#### Solution Summary

The expert examines a sample mean for a normal population.