# Question

Of 43 bank customers depositing a check, 18 received some cash back.

(a) Construct a 90 percent confidence interval for the proportion of all depositors who ask for cash back.

(b) Check the normality assumption of p.

(a) Construct a 90 percent confidence interval for the proportion of all depositors who ask for cash back.

(b) Check the normality assumption of p.

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