A state wide Math test for 4th graders had a population mean score of 69 and population standard deviation of 7.8. Assume these values are normally distributed. We want to find the maximum mean score for a group of 48 students to be in the bottom 25 %. a.) For the bottom 25 % we will use the probability b.) Use page 3 of the distribution table and part a. to find the critical Z-score Z c.) Use the formula to find the maximum mean score for a group of 48 to be in the bottom 25 %. =+Z (Round to the nearest whole number)