27. in constructing a confidence interval estimate of the population mean you decide to select 49 random observations to get your point estimate of the mean (sample mean). your friend is also constructing a similar confidence interval estimate but decides to use a sample size of 36 random observations.
which of the following is true?
a.) your confidence interval estimate is narrower
b.) your friend’s confidence interval estimate has a greater degree of confidence
c.) your confidence interval estimate is wider
d.) your confidence interval estimate has a greater degree of confidence
2.) the width of a confidence interval estimate for a proportion will be:
a.) narrower for 99% confidence level than for a 95% confidence level
b.) wider for a sample size of 100 than for a sample size of 75
c.) narrower for 90% confidence level than for a 95% confidence level
d.) narrower when the sample proportion is .50 than when the sample proportion is 20.