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

Algebra ->  Probability-and-statistics -> 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       Log On


   

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) About Me  (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