The Mean of the Population ( )Is 200 on a Test

Multiple Choice

The mean of the population ( ) is 200 on a test that measures math skills of middle school students.The variance .The test scores for the students in Mr.Petris's class at Suburban Middle School are given below.Use a rejection region with a probability of 5% only in the upper tail.What should you conclude?

A) Since the z-value falls within the region of rejection,we should conclude this sample mean likely represents some other population.
B) Since the z-value does not fall within the region of rejection,we should not conclude this sample mean represents some other population.
C) Since the z-value falls within the region of rejection,we should not conclude this sample mean represents some other population.
D) Since the z-value does not fall within the region of rejection,we should conclude this sample mean likely represents some other population.