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Use the normal distribution of IQ scores, which has a mean of 90 and a standard deviation of 14, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. Click the icon to view the table. X Data table Percentage of scores less than 90 is Standard Scores and Percentiles for a Normal Distribution (Round to two decimal places as needed.) (cumulative values from the left) Full data set Standard score Standard score - 3.0 0. 13 53.98 - 2.5 0.62 0.5 69.15 2.28 0.9 81.59 6.68 84. 13 15.87 93.32 0.9 18.41 97.72 0.5 30.85 99.38 0.1 46.02 99.87 50.00 99.98 swer an example Get more help