QUESTION 20 Provide an appropriate response. The owner of a computer repair shop has determined that their daily re...

Question

Question

Answer 1

Answer #1

Solution

Question 20

Answer: 0.0853

given : mean (u) = 7200, standard deviation (0) = 1200, sample size (n) = 30

1 - formula : z=

7500 – 7200 PT> 7500)P 1200

→ P2> 1.37)

1- Plz <1.37)

Refer Z-table to find the probability or use excel formula "=NORM.S.DIST(1.37, TRUE)" to find the probability.

1-0.9147

合0.0853

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Question 21

Answer: vn

Standard error of the mean (0x) =

Answer 2

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