Question

Calculate the Mean and Standard Deviation of a Normal Distribution Question Horace was told that his math test score was 3 standard deviations above the mean. If test scores were approximate normal with = 81 and o = 6, what was Horace's score? Do not include units in your answer. For example, if you fo that the score was 81 points, you would enter 81. Provide your answer below: FEEDBACK MORE INSTRUCTION Coment attribution • Previous

Answer 1

Answer is 99

Explanation:

Given that Horace was told that his math test score was 3 standard deviations above the mean.

If X is the test score then X is approximate normal with = 81 and o = 6

Since Horace is 3 std dev above the mean we have to add 3 times std dev to the mean.

Hence from this we can say Horace score = 3 times std dev +mean

=
`81+3(6)\\= 99`

Horace score is 99