Randy took a standardized test that is normally distributed. He scored a 105 on the test. The nationwide mean score on the test

Question

4 years ago

15

Randy took a standardized test that is normally distributed. He scored a 105 on the test. The nationwide mean score on the test

was 94 and the standard deviation was 6.2. What percent of the tested population scored higher than Randy on the test? Round to the nearest whole percent.

Mathematics

1 answer:

algol [13] · Answer 1 · 2022-02-16T13:26:23+03:00

algol [13]4 years ago

5 0

Answer:

4% of the tested population scored higher than Randy on the test

Step-by-step explanation:

P(X>105) = normalcdf(105,1e99,94,6.2) = 0.0380155219 ≈ 0.038 ≈ 3.8% ≈ 4%

Therefore, about 4% of the tested population scored higher than Randy on the test.