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DiKsa [7]
3 years ago
9

Can someone help me number 4 only thanks :)

Mathematics
2 answers:
N76 [4]3 years ago
7 0
The answer is 22.. you just do 48 minus 22 to get your answer
Elanso [62]3 years ago
6 0
22 boxes still need to be given out
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Among freshman at a certain university, scores on the Math SAT followed the normal curve, with an average of 550 and an SD of 10
lina2011 [118]

Answer:

a) 6.68th percentile

b) 617.5 points

Step-by-step explanation:

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In this problem, we have that:

\mu = 550, \sigma = 100

a) A student who scored 400 on the Math SAT was at the ______ th percentile of the score distribution.

Z = \frac{X - \mu}{\sigma}

Z = \frac{400 - 550}{100}

Z = -1.5

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So this student is in the 6.68th percentile.

b) To be at the 75th percentile of the distribution, a student needed a score of about ______ points on the Math SAT.

He needs a score of X when Z has a pvalue of 0.75. So X when Z = 0.675.

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X - 550 = 0.675*100

X = 617.5

6 0
3 years ago
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