Homework: Video 11D Sections 6.2 6.3 (Time:16:34) Save Score: 0 of 1 pt 3 of 4 (

Question

Homework: Video 11D Sections 6.2 6.3 (Time:16:34) Save Score: 0 of 1 pt 3 of 4 (4 complete) Hw Score: 60%, 3 of 5 pts 6.3.9 a Assigned Media Question Help Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. Click to view page 1 of the table, Click to view page 2 of the table, 0.97 The indicated iQ s oro, x, «D (Round d ne decimal place as needed) Enter your answer in the answer box and then click Check Answer

Explanation / Answer

Answer to the question is as follows:

Mean = 100
Stdev = 15

For a cumulative area under curve of .97 we have a Z of 1.88

So, x = Z*Stdev + Mean = 1.88*15 + 100 = 128.2

Hence, 128.2 is the indicated IQ where x leads to .97 of cumulative area

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