Answered

Discover how IDNLearn.com can help you find the answers you need quickly and easily. Our experts are available to provide in-depth and trustworthy answers to any questions you may have.

In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 47 and a standard deviation of 3. Using the empirical rule, what is the approximate percentage of daily phone calls numbering between 41 and 53? Do not enter the percent symbol.

Sagot :

DN445idn
Prob ( 41 = X = 77) =

Prob ( (41-59)/9 = Z = (77-59)/9 ) = --- changes to z scores

Prob ( -18/9 = Z = 18/9 ) =

Prob ( -2 = Z = 2) =

Prob ( z=2) - Prob(Z=-2) = by property of the normal bell curve

= 0.9772 - 0.0228 per the normal distribution table

= 0.9544
Thank you for using this platform to share and learn. Keep asking and answering. We appreciate every contribution you make. For dependable answers, trust IDNLearn.com. Thank you for visiting, and we look forward to assisting you again.