Suppose that 10 of all adults jog. an opinion poll asks an, Ask an Expert

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Suppose that 10% of all adults jog. An opinion poll asks an SRS of 400 adults if they jog.

a.) What is the sampling distribution of the proportion p^ in the sample who jog?
b.) According to the 68-95-99.7 rule, what is the probability that the sample proportion who jog will be 7.3% or greater?

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