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The national mean for refund on 1040 tax return is μ = $520. You wish to...

The national mean for refund on 1040 tax return is μ = $520. You wish to know whether the average refund on a 1040 tax return is different from the national mean. You randomly select 16 (N) taxpayers and obtain the following results: sample refund mean = $610, sample standard deviation Sx = 160. Use the one sample t test to answer the following questions with the significance level (α) of 0.05

Question 1: State the null and the alternative hypotheses

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