bcardoso07 bcardoso07

01-02-2017
Mathematics

contestada

The average score on a standardized test is 500 points with a standard deviation of 50 points. What is the probability that a student scores more than 400 on the standardized test?

Respuesta :

casltiel2 casltiel2

01-02-2017

Z = (score-mean)/SD

Calculate Z and find its proportion in table in the back of your stats book labeled "areas under normal distribution". Convert proportion to number of students.

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