Question

A set of 15 students took a math test. The test was out of 50 points and the scores were as followed: 23, 28, 29, 30, 30, 32, 33, 36, 36, 40, 41, 43, 45, 46, 48 1.

Find the Mean test score of the test
2. Find the Standard Deviation of the test 3. Using a Normal Distribution, what is the probability a student scores higher *than a 35 on the test
4. Using a Normal Distribution, what is the probability a student scores between a 30 and 40 on the test?​

Answer 1

1. 33.6

Explanation:

1. Mean = total score/number of tests

= (23+28+29+30+30+32+33+36+36+40+41+43+45+46+48)/15

=33.6

I don't know any of the others, but I hope that this will be helpful :)