A 90% Confidence Interval Is Constructed for the Population Mean

question 19

Multiple Choice

A 90% confidence interval is constructed for the population mean.If a 95% confidence interval had been constructed instead (everything else remaining the same) ,the width of the interval would have been ________ and the probability of making an error would have been _________.

• A)Wider;bigger
• B)Wider;smaller
• C)Narrower;bigger
• D)Narrower;smaller