A Seattle consumer agency believes that plumber's rates are too high and wants to estimate the mean hourly rate for all plumbers in Seattle. A random sample of 40 plumbers in the Seattle area shows that the 35% had an hourly rate over $40. Construct a 99% confidence interval for the proportion of hourly charges for all plumbers in Seattle that are over $40. O(0.74031, 1.0097) O(0.77251, 0.97749) O(0.15574, 0.54426) O(0.20219, 0.49781)

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