Chapter 7: Q 46 (page 429)
46. Draw the graph from Exercise 7.45
Short Answer
The graph from Exercise 7.45 is given below:
Chapter 7: Q 46 (page 429)
46. Draw the graph from Exercise 7.45
The graph from Exercise 7.45 is given below:
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The cost of unleaded gasoline in the Bay Area once followed an unknown distribution with a mean of and a standard deviation of . Sixteen gas stations from the Bay Area are randomly chosen. We are interested in the average cost of gasoline for the gas stations. The distribution to use for the average cost of gasoline for the gas stations is:
a.
b.
c.
d.
In order for the sums of distribution to approach a normal distribution, what must be true?
An unknown distribution has a mean 12 and a standard deviation of one. A sample size of is taken.
Let = the object of interest.
What is the mean of ?
What is the z-score for Σx = 840?
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