Question: Please help 1. Suppose a 95% confidence interval for u turns out to be (47.6, 53.8). To make more useful inferences from the interval width?

Please help

1. Suppose a 95% confidence interval for u turns out to be (47.6, 53.8). To make more useful inferences from the interval width? data, it is desired to reduce the width of the confidence interval. Which of the following will result in a reduced a. Increase the sample size b. Increase the confidence level c. Increase the population mean d. Increase the sample mean 2. A random sample of 68 nursing students required an average of 50.7 minutes to complete a statistics exam. Assume that the population standard deviation to complete the exam was 10.4 minutes. What is the 95% confidence interval around this sample mean? a. (48.1, 53.4) b. (45.4, 56.6) C.(48.9. 52.5) d. 49 8. 51.6)

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