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Analyzing sample data

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A researcher claims that the average age of people who buy theatre tickets is 39. A sample of 30 is selected and their ages are recorded as shown below. The standard deviation is 8. At a = 0.05 is there enough evidence to reject the researcher's claim? (Show all work please so I am able to understand.)

45 38 40 45 35 37 45 43 45 48

44 38 45 44 41 45 50 45 37 39

45 46 35 41 39 41 38 39 39 55

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The expert examines the analyzing sample data for researchers claim.

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Hi there,

Thanks for letting me work on your post. Here is my explanation:

Null hypothesis: mu=39
Alternative hypothesis: mu is not equal to ...

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