# Verifying Requirements and Finding the Margin of Error. In Exercises 1–4, find the margin of error… 1 answer below »

Verifying Requirements and Finding the Margin of Error. In Exercises 1–4, find the margin of error and confidence interval if the necessary requirements are satisfied. If the requirements are not all satisfied, state that the margin of error and confidence interval cannot be calculated using the methods of this section.1. Credit Rating FICO (Fair, Isaac, and Company) credit rating scores of a simple random sample of applicants for credit cards: 95% confidence; n = 50,  = 677 and σ is known to be 68.2. Braking Distances The braking distances of a simple random sample of cars: 95% confidence; n =32,  = 137 ft, and σ is known to be 7 ft.3. Rainfall Amounts The amounts of rainfall for a simple random sample of Saturdays in Boston: 99% confidence; n = 12,  = 0.133 in., σ is known to be 0.212 in., and the population is known to have daily rainfall amounts with a distribution that is far from normal.4. Failure Times The times before failure of integrated circuits used in calculators: 99% confidence; n = 25,  = 112 hours, σ is known to be 18.6 hours, and the distribution of all times before failure is far from normal.

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