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5. Entrance exam scores for freshmen to Isabela State University are tabulated below: 990 1430 1155 1059 1215 736 1352 898 999 1151 1254 269 458 582 387 1141 761 655 456 850 a. Find the highest and lowest scores and compute the range of the scores. b. Compute the mean score 0. What is the value of the variance? (1. What is the value of the standard deviation? 6. The following set of data represents a simple random sample of IQ scores of 32 students at ISU. 137 141 128 135 159 122 140 118 126 133 111 125 127 116 138 203 120 121 131 122 125 126 118 119 117 139 133 124 168 135 126 131 a. Calculate the range of the test scores. b. Calculate the sample standard deviation and variance. 7. Using the following, ca10u1ate the z-score that corresponds to the raw score indicated. X[Mean) S x z-score 97 9.23 100 46 8.0 38 8 0.52 9 22 4.69 24 31 7.15 24 54 1.50 39 100 6.50 1 10 75 3.75 72