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 is 99

Step-by-step 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

=

Horace score is 99

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

total of apples - take away four

6-4 = 2

answer is 2 apples