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AssignmentMultiple Choice

More about Confidence Intervals

Question 1 • CA-Statistics and Probability B

After deciding on a 95% confidence level, a researcher is trying to decide what sample size to use. Using a sample size of 800 instead of 200 would increase the cost to conduct her research, but how will it affect her margin of error?

Answer
A
The interval will be more likely to capture the true population parameter because it will be wider.
B
The interval will be less likely to capture the true population parameter because it will be narrower.
C
The margin of error will be cut in half.
D
The margin of error will be doubled.
After deciding on a 95% confidence level, a…