A new treatment was utilized and assessed by a researcher. The scores from a sample of 30 students produced a mean of 25.4, with a standard deviation of 5.95. In the general population, the standardized tests are known to have a population mean of 27.5. Because there are no previous studies using this new treatment, the researcher doesn't know how it will affect students. She predicts that there will be some change in the scores. Therefore, the researcher performs a hypothesis test to determine if there is a significant effect.
State the null hypothesis. Use the drop-down lists to fill in the following expression.
H0: μ = 27.5