Question: when 25 randomly selected car owners are polled, it is found that the mean length time they plan to keep their car is 7.01 years

when 25 randomly selected car owners are polled, it is found that the mean length time they plan to keep their car is 7.01 years with standard deviation of 3.74 years and the amount of years they keep their cars is approximately normally distributed. At the 0.01 level of significance , can you support the claim that the mean length time for all car owners is less than 7.5 years?

identify the claim and state the null and alternative hypothese

Find the standardized test statistic

Find the critical values or P vaule

Decide whether to reject or fail to reject the null hypothesis

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