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COMPREHENSIVE EXAMINATION. STATISTICS FOR RESEARCH. APRIL 24, 2021. Solve all problems. Show your handwritten solution. 1. The lowest score is 4 and the highest score is 53 There are 10 class intervals The sample size is 40 The sum of the product of the frequency and the midpoint = 1260 The frequency of the median class interval is equal to the class size The cumulative frequency below the median class interval is given by the equation: fcum = - - 2 2 Determine the median class interval if the sample mean is equal to the median. Show your solution. 2. The following data are given: The sample size of the distribution of raw scores = 15 an The sample variance of the raw scores = 10.78 The sum of the square of the raw scores = 5604 What is the summation of the raw score? Show the solution