A sample of 100 fuses from a very large shipment is found to have 10 that are defective. Based on this information, which of the following will you construct to learn about the proportion of fuses that are defective?
A) Confidence interval estimate for the mean using the Student's t distribution
B) Confidence interval estimate for the total using the Student's t distribution
C) Confidence interval estimate for the difference between two means using the standard normal distribution
D) Confidence interval estimate for the proportion using the standard normal distribution
Question 2
Private colleges and universities rely on money contributed by individuals and corporations for their operating expenses. Much of this money is put into a fund called an endowment, and the college spends only the interest earned by the fund. A recent survey of 8 private colleges in the United States collected information on the endowment amount. Based on this information, which of the following will you construct to learn about the mean endowment of all private colleges in the United States?
A) Confidence interval estimate for the proportion using the standard normal distribution
B) Confidence interval estimate for the difference between two means using the standard normal distribution
C) Confidence interval estimate for the total using the Student's t distribution
D) Confidence interval estimate for the mean using the Student's t distribution
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