A simple random sample of 49 women has a mean height of 63.5 inches and assumes the population standard deviation is 3.5 inches. The 99% confidence interval for the population mean is: O (62.7, 64.3) O (-1.645, +1.645) O (62.2, 64.8) (57.74,69.26) The regression equation for predicting performance on a college entrance exam based on high school grade point average (GPA) was fitted using GPAs values between 2.5 and 4.0. The regression line is determined to be: Entrance exam score = 91.2(GPA) + 273.5 One student in the study had a high school GPA of 1.5. What is true about the predicted value of the performance of the entrance exam score? O It is expressed as: 91.2(1.5)+273.5-410.3 O It is expressed as: 91.2(2.5)+273.5-501.5 O It is expressed as: 91.2(4)+273.5-638.3 O It is not possible to predict the student's performance score because the GPA is out of the range of the observed GPAs.. It is difficult to obtain a significant result when the hypothesis is conducted at two-tails rather than when it is conducted at the single tail. Because in the two-tail test the p- value is twice the p-value for a single-tail test. (Select true of false) O True O False Question 12 4 pts The p-value of a test is the chance that the null hypothesis is true (Select true of false) O True O False