A study is being done to test whether a specific fuel additive increases gas mileage in a particular model of pickup truck. Without the additive, these trucks average 19.2 miles per gallon at highway speed. Repeating these tests has revelated that the gas mileage of these trucks at highway speed are Normally distributed, with a standard deviation of 1.0 miles per gallon. Nine trucks were ran at highway speed with the fuel additive and their gas mileages were recorded. The average gas mileage of these nine trucks was 19.8. Conduct the first three steps of a test of significance in determining if this fuel additive has the desired effect. (a) State the null hypothesis Ho and the alternative hypothesis Ha! Please show work
A study is being done to test whether a specific fuel additive increases gas mileage in
a particular model of pickup truck. Without the additive, these trucks average 19.2
miles per gallon at highway speed. Repeating these tests has revelated that the gas
mileage of these trucks at highway speed are
deviation of 1.0 miles per gallon. Nine trucks were ran at highway speed with the fuel
additive and their gas mileages were recorded. The average gas mileage of these nine
trucks was 19.8. Conduct the first three steps of a test of significance in determining
if this fuel additive has the desired effect.
(a) State the null hypothesis Ho and the alternative hypothesis Ha! Please show work
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