Question 320119: A leasing firm claims that the mean number of miles driven annually, , in its leased cars is less than miles. A random sample of cars leased from this firm had a mean of annual miles driven. It is known that the population standard deviation of the number of miles driven in cars from this firm is miles. Assume that the population is normally distributed. Is there support for the firm's claim at the level of significance?
Perform a one-tailed test. Then fill in the table below.
What is the null hypothesis?
What is the alternative hypothesis?
What is the type of test statistic (Z, T, Chi Square). If T what is the degree of freedom?
What is the value of the test statistic (round at least 3 decimal places)
What is the critical value at the 0.05 level of significance (round at least 3 decimal places)
Can we support the leasing firms claim that the mean number of miles driven annually is less than 13280 miles?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A leasing firm claims that the mean number of miles driven annually, , in its leased cars is less than miles. A random sample of cars leased from this firm had a mean of annual miles driven. It is known that the population standard deviation of the number of miles driven in cars from this firm is miles. Assume that the population is normally distributed. Is there support for the firm's claim at the level of significance?
Perform a one-tailed test. Then fill in the table below.
What is the null hypothesis?
What is the alternative hypothesis?
What is the type of test statistic (Z, T, Chi Square). If T what is the degree of freedom?
What is the value of the test statistic (round at least 3 decimal places)
What is the critical value at the 0.05 level of significance (round at least 3 decimal places)
Can we support the leasing firms claim that the mean number of miles driven annually is less than 13280 miles?
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Read your posted problem. Notice that there are numbers missing from
the text. I asked the site manager to look at what appears to be dropped
numbers. Here is his feedback:
"As far as I can tell, the numbers really are missing and there is no
indication that they exist but in some unreadable format."
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If you are using a non-standard way of posting your numbers, you
might want to change that.
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Cheers,
Stan H.
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