2) The average weekly earnings of the plumbers in a city is $748 with a population standard deviation of $21. Assume that we select a random sample of 53 plumbers. a) What is the sampling distribution of the mean weekly earnings of plumbers? (i.e. What is the sampling distribution of X?) b) Find the probability that the sample mean weekly earnings will be between $740 and $745.

MATLAB: An Introduction with Applications
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b) Pearl E. Gates has a test score called S. If another child in the class is picked at random, the probability that
the other child has a score higher than Pearl is 0.68. Find Pearl's test score.
2) The average weekly earnings of the plumbers in a city is $748 with a population standard deviation of $21.
Assume that we select a random sample of 53 plumbers.
a) What is the sampling distribution of the mean weekly earnings of plumbers?
(i.e. What is the sampling distribution of x?)
b) Find the probability that the sample mean weekly earnings will be between $740 and $745.
Transcribed Image Text:b) Pearl E. Gates has a test score called S. If another child in the class is picked at random, the probability that the other child has a score higher than Pearl is 0.68. Find Pearl's test score. 2) The average weekly earnings of the plumbers in a city is $748 with a population standard deviation of $21. Assume that we select a random sample of 53 plumbers. a) What is the sampling distribution of the mean weekly earnings of plumbers? (i.e. What is the sampling distribution of x?) b) Find the probability that the sample mean weekly earnings will be between $740 and $745.
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