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D Question 8 3 pts A study was done to see if students who took AP Calculus before taking the AP statistics course did better than students who did not take AP Calculus. They wanted to see if there was a difference in the AP Statistics exam scores. The p-value was 1.0. What does this mean? There is no evidence that the sample mean scores are the statistically significantly different. The sample mean scores are the same. There is no evidence that the population mean scores are significantly different. The population mean scores are the same. D Question 9 3 pts Suppose that a doctor wants to determine if a new exercise plan helps lower participants' blood pressure levels. The blood pressure level for each participant is recorded for each participant before beginning the program. Each of the participants then participates in the new exercise plan for 6 weeks. Then blood pressure is then taken again. Let mu_d = the average blood pressure before - average blood pressure after. What is the correct alternative hypothesis? O H_a: mu_d > 0 O H_a: x_bar_1 - x_bar_2 0 O H_a: mu_1 - mu_2