SOLUTION: THE AMOUNT OF JENI MONTHLY PHONE BILL IS NORMALLY DISTRIBUTED WITH A MEAN OF $55 AND A STANDARD DEVIATION OF $8. wHAT PERCENTAGE OF HER PHONE BILLS ARE BETWEEN $31 AND $79, USING
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Question 918983: THE AMOUNT OF JENI MONTHLY PHONE BILL IS NORMALLY DISTRIBUTED WITH A MEAN OF $55 AND A STANDARD DEVIATION OF $8. wHAT PERCENTAGE OF HER PHONE BILLS ARE BETWEEN $31 AND $79, USING THE 68-95-99.7 RULE
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
3SDs on either side of mean: 99.7 would be the % of bills: $31 < x < $79
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