richelleperry richelleperry

24-07-2020
Mathematics

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Assume that adults have IQ scores that are normally distributed with a mean of 104 and a standard deviation of 15. Find the third quartile Upper Q 3 , which is the IQ score separating the top 25% from the others. Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING... The third quartile, Upper Q 3 , is nothing . (Round to one decimal place as needed.)

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emoffett32 emoffett32

24-07-2020

Answer:

z = (X-Mean)/SD

X = Mean + (z*SD)

The z value which separates the bottom 75% (100%-25%) from the top 25% is + 0.6745

Therefore, Q3 = X = 107 + (0.6745*16) = 117.8

Step-by-step explanation:

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