3 years ago

Wapi simplified an expression. His work is shown below

2 answers:

4 0

Step 3: in step 3 he needed to do 8 divided by 2 first because of order of operations, also he changed the division sign into an addition sign.

Taya2010 [7]3 years ago

4 0

Answer:

Step 3

explanation:

I got it right on edge, hope it helps :]

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Consider a set of 7500 scores on a national test whose score is known to be distributed normally with a mean of 510 and a standa

german

$\mathbb P(X>600)=\mathbb P\left(\dfrac{X-510}{85}>\dfrac{600-510}{85}\right)=\mathbb P(Z>1.059)\approx0.145$

So approximately 14.5% of the scores are higher than 600. This means in a sample of 7500, one could expect to see $0.145\times7500\approx10.86$ scores above 600.