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14.) For a population with a standard deviation of ό = 8, a score of x = 44 corresponds to z = - 0.50, what is the population mean?18.) In a population of exam scores, a score of x = 48 corresponds to z = + 1.00 and a score of x = 36 corresponds to z = 0.50. Find the mean and the standard deviation for the population. 22.) For each of the following, identify the exam score that should lead to the better frade. In each case, explain your answer.
Additional Item: 1.Review your response to item 22 above. Your principal is interested in seeing the relationship between performance on a summative (final) exam produced by the math teachers in your school and the state Common Core exam. How could z-scores be used to make this comparison for a selected group of 25 students in your school? (maximum 300 words)