Question

A students received a score of 50 on his history test. The test had a mean of 69 and a standard deviation of 10. Find the z score and assess whether his score is considered unusual.

Answer 1

i believe its 69.5 or 10 50 69

Answer 2

-1.9 unusual

Explanation:

z score is (x-mean)/sd so 50-69=-19

-19/10=-1.9