the standard deviation of the fuel consumption of a certain

the standard deviation of the fuel consumption of a certain automobile is believed a at most 4.3 miles per gallon. A random sample of 20 automobiles produced a standard deviation of 5.2 miles per gallon. use 0.05 to perform a hypothesis to check on the belief.

Null hypothesis:

meaning in words:

Alternative hypothesis:

Meaning in words:

use the p value to make a decision.

Solution