3 years ago

In a mid-size company, the distribution of the number of phone calls answered each day by each of

Mathematics

1 answer:

Ilia_Sergeevich [38]3 years ago

4 0

Answer:

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

Step-by-step explanation:

make sense ?

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