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A chemicalsupply company ships a certain solvent in 10 gallon drums. Let X represent the number of drums ordered by a randomly chosen customer. Assume X has the following probability mass function:
x
1
2
3
4
5
P(x)
0.4
0.2
0.1
A) Determine the cumulative distribution functionfor X.
B) Let Y bethe num. of gallons ordered. Find the probability mass function of Y.
C) Find the mean and varianceof the number of gallons ordered.
The sample mean of the sampling distribution of a statistic is 6 and the standard error of the statistic is 1.03. What is the probability that xbar > 7.52?
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