SOLUTION: Homer scored 76 on his math test. The class average was 61, the median was 66, and the variance was 25. 1) What is Homers percintile rank on this test? 2) What percent of the

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Question 412037: Homer scored 76 on his math test. The class average was 61, the median was 66, and the variance was 25.
1) What is Homers percintile rank on this test?
2) What percent of the people taking this test scored better than homer?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Homer scored 76 on his math test.

The class average was 61, the median was 66, and the variance was 25. 

*Note: z+=+blue%28x+-+mu%29%2Fblue%28sigma%29 average(sum of scores/number of scores) and mean the same.

   z = (76-61 / 25 = 15/25 = 3/5 = .6

  P(z < .6) = .72575  

1) Homers Percentile rank is 72.575%

2) What percent of the people taking this test scored better than homer? 27.425%