A Researcher Selects a Sample of 36 Students from a School

Multiple Choice

A researcher selects a sample of 36 students from a school population with a mean IQ of 100 and standard deviation of 12.She determines that the mean IQ in this sample is 104.Assuming she computes a one-sample z test at a .05 level of significance,what is the decision for a two-tailed test?

A) Retain the null hypothesis;IQ scores in this sample are the same as those in the population.
B) Reject the null hypothesis;IQ scores in this sample are significantly higher than those in the population.
C) There is not enough information to make a decision.