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Historically, 72% of credit card users carry a balance from month-to-month. A certain credit card company...

Historically, 72% of credit card users carry a balance from month-to-month. A certain credit card company would like to study the spending patterns of its cardholders in more detail and to start the analysis, takes a random sample of 137 cardholders.

What is the center of the sampling distribution for the sample proportion?  (2 decimal places)

What is the standard deviation for this sampling distribution?  (4 decimal places)

What is the probability more than 68% of the cardholders in this sample are carrying a balance?  (Use 4 decimals.)

math   Statistics-And-Probability   
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