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C. Find the percentile rank of the person who scored 88. (6 points) Z= (88 - 75) / 15 Z = 0.87 > 0. 8078
C. Find the percentile rank of the person who scored 88. (6 points) Z= (88 - 75) / 15 Z = 0.87 > 0. 8078 ~ 80.78 The person who scored 88 is in the 80th, percentile.3. Ten thousand adults were given a literacy test. The results were nearly normally distributed (1 = 75, 6 = 15). (20 points) A. About how many scored between 60 and 80? (8 points) ( 60-75) / 15 =-1 7.1587 (80- 75) /15 = 0.33 7 6293 0. 6293 - 0. 1587 = 0.4706 adults About 4706 scored between 60 and 80. B. Approximately what score did only the top 15% exceed? (6 points) ( 1.03 + 1.04 ) /2 = 1.035 ( 1.035 ) ( 15 ) + 75 = 90.525 The top 15% exceeded a score of 90.53
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