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Refer to the Buena School District bus data. Select the variable for the number of miles traveled last month.
Refer to the Buena School District bus data.
a. Select the variable for the number of miles traveled last month. Conduct a test of hypothesis to determine whether the mean number of miles traveled is equal to 840. Use the .01 significance level. Find the p-value and explain what it means.
b. Using the maintenance cost variable, conduct a test of hypothesis to determine whether the mean maintenance cost is less than $500 at the .05 significance level. Determine the p-value and interpret the result.
c. Suppose we consider a bus "old" if it is more than eight years old. At the .01 significance level, can we conclude that less than 40% of the buses are old? Report the p-value.
