21.18 Do you jog? Suppose that 10% of all adults jog. An opinion poll asks an SRS of 400 adults if they jog.
21.18 Do you jog? 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 pin 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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21.18 Do you jog? Suppose that 10% of all adults jog. An opinion poll asks an SRS of 400 adults if they jog.
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