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Lifetimes of a random sample of 100 tires

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Reference no: EM132168151

Suppose I had measured the lifetimes of a random sample of 100 tires rather than 25. Which of the following statements is true?

a. The margin of error for our 95% confidence interval would increase.

b. The margin of error for our 95% confidence interval would decrease.

c. The margin of error for our 95% confidence interval would stay the same, since the level of confidence has not changed. d. σ would decrease.

Reference no: EM132168151

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