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4 years ago

6

A set of test scores is normally distributed with a mean of 78 and a standard deviation of 4.5. Dwayne scored 87 on the test. Wh

at is his percentile score?
A.97.5 percentile

B.99.85 percentile

C.87 percentile

D.47.5 percentile

2 answers:

notka56 [123]4 years ago

7 0

<span>The percentile score would most likely be 97.5, Hope this helps!! :D

</span>

rodikova [14]4 years ago

6 0

Answer:

A.97.5 percentile

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Answer:

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Step-by-step explanation:

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$0.04\sqrt{n} = 1.96\sqrt{0.6231*0.3769}$

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$(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.6231*0.3769}}{0.04})^{2}$

$n = 563.8$

Rounding up

We need a sample size of 564.

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Step-by-step explanation:

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