Out of a sample of 94 purchases at the drive-up window of a

Reference no: EM13607989

Out of a sample of 94 purchases at the drive-up window of a fast-food establishment, 27 were made with a major credit card.

a) Estimate the proportion of sales made with a credit card.

b) Obtain the estimated standard error.

c) Find a 98% confidence interval for the population proportion of purchases paid with a major credit card.

Reference no: EM13607989

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