document.write( "Question 608257: A quart of parkers milk contains a mean of 39 grams of butterfat with a standard deviation of 2 grams. If the butterfat is normally distrubuted find the probability that the quart of this brand of milk chosen at random will contain A. 39-43 grams of butterfat of B. 36-39 grams of butterfat \n" ); document.write( "
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A quart of parkers milk contains a mean of 39 grams of butterfat with a standard deviation of 2 grams. If the butterfat is normally distrubuted find the probability that the quart of this brand of milk chosen at random will contain
\n" ); document.write( "A. 39-43 grams of butterfat
\n" ); document.write( "z(39) = (39-39)/2 = 0
\n" ); document.write( "z(43) = (43-39)/2 = 2
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\n" ); document.write( "P(39<= x <=43) = P(0<= x <=2) = 0.4772
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\n" ); document.write( "\n" ); document.write( "B. 36-39 grams of butterfat
\n" ); document.write( "z(36) = (36-39)/2 = -3/2
\n" ); document.write( "z(39) = 0
\n" ); document.write( "---
\n" ); document.write( "P(36<= x <=39) = P(-3/2<= z <=0) = 0.4332
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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