What hypothesis testing procedure should you use to answer these questions? 0.05 if it isn't Assume all samples are simple random samples, and assume x = specified. A car company says that the mean gas mileage for its luxury sedan is at least 21 mpg. You believe the claim is incorrect and find that a random sample of 5 cars has a mean gas mileage of 19 mpg and a sample standard deviation of 4 mpg. Assume the gas = 0.05, mileage of all of the company's luxury sedans is normally distributed. At x = test the company's claim. One sample z-test for the population mean. Two sample z-test for the population means. One sample z-test for proportions. Two sample z-test for proportions. One sample t-test for the population mean. None of our hypothesis tests fit. Smy

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What hypothesis testing procedure should you use to answer these questions?
Assume all samples are simple random samples, and assume x = 0.05 if it isn't
specified.
A car company says that the mean gas mileage for its luxury sedan is at least 21 mpg.
You believe the claim is incorrect and find that a random sample of 5 cars has a mean
gas mileage of 19 mpg and a sample standard deviation of 4 mpg. Assume the gas
mileage of all of the company's luxury sedans is normally distributed. At x = 0.05,
test the company's claim.
One sample z-test for the population mean.
Two sample z-test for the population means.
One sample z-test for proportions.
Two sample z-test for proportions.
One sample t-test for the population mean.
None of our hypothesis tests fit.
20
Transcribed Image Text:What hypothesis testing procedure should you use to answer these questions? Assume all samples are simple random samples, and assume x = 0.05 if it isn't specified. A car company says that the mean gas mileage for its luxury sedan is at least 21 mpg. You believe the claim is incorrect and find that a random sample of 5 cars has a mean gas mileage of 19 mpg and a sample standard deviation of 4 mpg. Assume the gas mileage of all of the company's luxury sedans is normally distributed. At x = 0.05, test the company's claim. One sample z-test for the population mean. Two sample z-test for the population means. One sample z-test for proportions. Two sample z-test for proportions. One sample t-test for the population mean. None of our hypothesis tests fit. 20
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