A survey conducted by CBS News asked 1,026 respondents: What would you do with an unexpected tax

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A survey conducted by CBS News asked 1,026 respondents: “What would you do with an unexpected tax refund?” The responses are summarized in the following table.

ResponseFrequency

Pay of debts.........482

Put it in the bank......308

Spend it..........112

I never get a refund.....103

Other............ 21

a. Construct the 90% confidence interval for the population proportion of those who would put the tax refund in the bank.

b. Construct the 90% confidence interval for the population proportion of those who never get a refund.


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