Question 381657
A standardized test has a mean score of 100 and a standard deviation of 15.
A. What percentage of people score between 70 and 85?
B. What percentage of people score between 100 and 115?
Find the z score
{{{z=(x-mu)/sigma}}}

A) {{{z[1]=(70-100)/85}}}
{{{z[2]=(85-100)/85}}}
{{{P=P(z[2])-P(z[1])}}}
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B) {{{z[3]=(100-100)/85=0}}}
{{{z[4]=(115-100)/85}}}
{{{P=P(z[4])-0.5)}}}
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