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the average number of miles a person drives per day is 24. A researcher believes that...

the average number of miles a person drives per day is 24. A researcher believes that people over age 60 drives less than 24 miles per day. she selects a random sample of people over age 60 of size 49 and gets a sample mean of 22.8. if sigma= 3.5mi, at alpha .05, is there sufficient evidence that drivers over age 60 drive less than 24 miles a day?
Math   Statistics-And-Probability   
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We can support the claim  that people over age 60 drives less than 24 miles per day.

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