Mathematics, 16.12.2021 01:50 ceve18
An 95% confidence interval for the average salary of all CEOs in the electronics industry was constructed using the results of a random survey of 45 CEOs. The interval was ($139,134,$154,365). To make more useful inferences from the data, it is desired to reduce the width of the confidence interval. Which of the following will resulting a narrower confidence interval for sure?
a. Increase the sample size and decrease the confidence level.
b. Decrease the sample size and increase the confidence level.
c. Increase the sample size and increase the confidence level.
d. Decrease the sample size and decrease the confidence level.
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