Evaluate the quotient of 1.05 x 103 and 1 x 103:
2 answers:
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Answer:
a) P=0.998
b) P=0.879
c) P=0.268
Step-by-step explanation:
The mean charges per passenger are:
The standard deviation is known to be σ=$25.
If the sample size is 60, we have to calculate:
a) the probability the sample mean will be within $10 of the population mean cost per flight.
This can be calculated from the z-value for a margin or error of 10 from the mean:
b) the probability the sample mean will be within $5 of the population mean cost per flight.
This can be calculated from the z-value for a margin or error of 5 from the mean:
c) the probability the sample mean will exceed $100
Again we will calculate the z-score for X=100.