Question: According to a study conducted by the Gallup organization, the proportion of Americans who are afraid to y is 0.10. A random sample of 1100

According to a study conducted by the Gallup organization, the proportion of Americans who are afraid to ﬂy is 0.10. A random sample of 1100 Americans results in 121 indicating that they are afraid to ﬂy. Explain why this is not necessarily evidence that the proportion of Americans who are afraid to ﬂy has increased since the time of the Gallup study.

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