A department store has determined that 36% of all their sales are credit sales. A random sample of 65 sales is selected.
(a) Explain the distribution of the sample proportion of the credit card sales.
(b) What is the probability that the sample proportion will be greater than 0.40?
(c) What is the probability that the sample proportion will be between 0.30 and 0.40?
(d) What is the probability that the sample proportion will be less than 0.30?
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