Question 752525
Q:
how do you get the mean of a quiz score when the student scored 469 and the z score is -3 and the standard deviation is 7? I am feeling lost or maybe tired
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A:
z score = {{{(x - mu)/sigma}}}
-3 = {{{(469 - mu)/7}}}, multiply both sides by 7
-21= {{{469 - mu}}}
{{{mu }}} = 469 + 21 = 490
The mean of a quiz score is {{{highlight(490)}}}.