34 50 42 50 58 18 50 82 QUESTION 29 1 points Save Answe Provide an appropriate r

Question

34 50 42 50 58 18 50 82 QUESTION 29 1 points Save Answe Provide an appropriate response. was instaled last year to help reduce the expense of personal calls that were being made by employees Before the new system was installed, the amount being spent on personal calls follows a normal distribution with an average of month and a standard deviation of $50 per month Refer to such expenses as PCE's (personal call expenses), Find the probebility that a randomly selected month had a PCE that falls below $750 $800 per 0.0013 0.1667 0.9987 0.8333 QUESTION 30 1 points Save A Find the indicated z-score.

Explanation / Answer

we know that the z score is given as

Z = (X-Mean)/sd

given that mean = 900
sd = 50
X = 750
so the corresponding z score is

Z = (750-900)/50 = -3

so we need to find P(Z<-3)

please keep the z tables ready
P ( Z<3 )=1P ( Z<3 )=10.9987=0.0013

Hence A

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