document.write( "Question 311278: a set of normally distributed student test scores has a mean of 80 and a standard deviation of 4. determine the probability that a random selected score will be between 74 and 82. \n" ); document.write( "

Algebra.Com's Answer #222592 by Fombitz(32388) $\"\"$ $\"About$

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Find the zscore for 74 and 82.
\n" ); document.write( " $\"z=%28x-xa%29%2Fsigma\"$
\n" ); document.write( " $\"z%2874%29=%2874-80%29%2F4=-1.5\"$
\n" ); document.write( " $\"z%2882%29=%2882-80%29%2F4=0.5\"$
\n" ); document.write( " $\"P%2874%29=0.066807\"$
\n" ); document.write( " $\"P%2882%29=0.691462\"$
\n" ); document.write( "P(74 < x < 82)= $\"P%2882%29-P%2874%29=0.624655\"$ \n" ); document.write( "

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