A leasing firm claims that the mean number of miles driven, Ask an Expert

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A leasing firm claims that the mean number of miles driven annually,M , in its leased cars is less than 13020 miles. A random sample of 90 cars leased from this firm had a mean of 12750 annual miles driven. It is known that the population standard deviation of the number of miles driven in cars from this firm is 1140 miles. Is there support for the firm's claim at the 0.1 level of significance?

Perform a one-tailed test. Then fill in the table below.

The null hypothesis is:
The alternative hypothesis is:

The type of test statistic: Z, t, chi square or f

The value of the test statistic (round to three decimal places)

The critical value at the 0.1 level of significance (round to three decimal places)

Can we support he leasing firms claim that the mean number of miles driven annually is less than 13020 miles?

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