A Researcher Selects a Sample from a Population with 

question 15

Multiple Choice

A researcher selects a sample from a population with  = 30 and uses the sample to evaluate the effect of a treatment.After treatment,the sample has a mean of M = 32 and a variance of s² = 6.Which of the following would definitely increase the likelihood of rejecting the null hypothesis?

• A)Increase the number of individuals in the sample
• B)Increase the sample mean
• C)Decrease the sample variance
• D)All of the other options will increase the likelihood of rejecting the null hypothesis.

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