IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. If a certain statistician has an of 122 ,

Question

3 years ago

5

what percent of the population has a lower IQ?
A. 47%
B. 93%
C. 22%
D. 99%
E. 7%

1 answer:

marusya05 [52] · Answer 1 · 2022-08-28T11:01:16+03:00

7 0

Answer:

B. 93%

Step-by-step explanation:

Find the z-score:

z = (x − μ) / σ

z = (122 − 100) / 15

z = 1.47

Find the probability using a calculator or z-score table.

P(Z < 1.47) = 0.93