A test of the hypotheses H0: = 7.5 versus Ha: < 7.5 has low power. What can the researcher do to increase the power of the test to reject the null hypothesis if = 7? Check all that apply.The researcher can increase the sample size.The researcher can cut the sample size in half.The researcher can decrease the significance level of the test.The researcher can increase the significance level of the test.The researcher can try to decrease the probability of making a Type II error.The researcher can try to increase the probability of making a Type II error.