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Stels [109]
3 years ago
11

The average test scores for a particular test in algebra was 84 with a standard deviation of 5. What percentage of the students

scored higher than 89%? Please explin your answer.
Mathematics
1 answer:
bija089 [108]3 years ago
5 0

Answer:

The percentage of the students scored higher than 89% is 15.87%

Step-by-step explanation:

we are given

The average test scores for a particular test in algebra was 84

so, mean is 84

\mu=84

a standard deviation of 5

so,

\sigma=5

we have

x=89

now, we can use z-score formula

z=\frac{x-\mu}{\sigma}

now, we can plug values

z=\frac{89-84}{5}

z=1

now, we can use calculator

and we get

p(z>1)=0.1587

So,

The percentage of the students scored higher than 89% is 15.87%

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