Question

# A random sample of 100 students is selected from a certain school. They are given an...

A random sample of 100 students is selected from a certain school. They are given an IQ test which has a known population standard deviation of 11. The sample mean is found to be 112.

What type of inference procedure is appropriate here? Why?

The sample size is greater than 30 and we know the population standard deviation. Hence,

The appropriate inference procedure will be z test for single sample mean.

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