About how many out of 300 would we expect to be wearing a, Basic Statistics

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About how many out of 300 would we expect to be wearing a

Helmets Suppose

we are testing bikers to see if the rate of use of helmets has changed from a previous value of 79%. Suppose that in our random sample of 300 bikers, we see that 255 wear helmets.

a. About how many out of 300 would we expect to be wearing a helmet if the proportion who wear helmets is unchanged?

b. We observe 255 bikers out of a random sample of 300 wearing helmets. The p-value is 0.33. Explain the meaning of the p-value.

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Basic Statistics: About how many out of 300 would we expect to be wearing a

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