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sveticcg [70]
1 year ago
10

SAT scores are normally distributed, with a mean of 500 points and a

Mathematics
1 answer:
babymother [125]1 year ago
8 0

Recalling that SAT scores are always expressed as multiples of 10, then the points we get on the test will be 628.

<h3>What do you mean by standard deviation?</h3>

In statistics, Standard deviation is a measure of the variation of a set of values.

σ = standard deviation of population

N = number of observation of population

X = mean

μ = population mean

WE have been given that SAT scores are normally distributed, with a mean of 500 points and a standard deviation of 100 points.

The solution as follows;

Let be X: scores of SAT

P(X ≥ x) = 0.9

P((X - 500)/100 ≥ (x - 500)/100) = 0.9

P(Z ≥ z) = 0.9

z = 1.28

1.28 = (x - 500)/100

128 + 500 = x

x = 628

Recalling that SAT scores are always expressed as multiples of 10, then the points we get on the test will be 628.

Learn more about standard deviation and variance:

brainly.com/question/11448982

#SPJ1

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