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A national safety council wishes to estimate the proportion of automobiles accidents that involve pedestrians. a. How large a sample of accident records must be

A national safety council wishes to estimate the proportion of automobiles accidents that involve pedestrians.

a. How large a sample of accident records must be examined to be 98% certain that the estimate does not differ from the true proportion by more than .03?

b. How large a sample of accident records must be examined to be 98% certain that the estimate does not differ from the true proportion by more than .03 given that the council believes that the true proportion is below .25?

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