A department store has determined that 25% of all their sales are credit sales. A random sample of 60 sales is selected.
a.What is the sampling distribution of 
?b.What is the probability that the sample proportion will be greater than 0.30?c.What is the probability that the sample proportion will be between 0.20 to 0.30?
What will be an ideal response?
| a. | E( ) = 0.25 Standard Error = .056 (rounded) |
| b. | 0.1867 |
| c. | 0.6266 |
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