The following display from a TI-84 Plus calculator presents a 95% confidence interval. Fill in the blanks: We are ________ confident that the population mean is between _______ and _______.

A) 95%, 52.45,54.30
B) 95%, 0,53.375
C) 5%, 0,53.375
D) 5%, 52.45,54.30

Question

The following display from a TI-84 Plus calculator presents a 95% confidence interval.  Fill in the blanks: We are ________ confident that the population mean is between _______ and _______.

A) 95%, 52.45,54.30 
B) 95%, 0,53.375 
C) 5%, 0,53.375 
D) 5%, 52.45,54.30

Quizplus · Accepted Answer

The display presents a 95% confidence interval, so the answer choices with 95% (A and B) are possible options. Option B has a lower limit of 0, which is not realistic for many situations, so we can eliminate it. Therefore, the best choice is A, which includes the appropriate confidence level and reasonable values for the lower and upper bounds of the interval.

The Following Display from a TI-84 Plus Calculator Presents a 95