A Statistics Professor Wishes to Estimate the Average Mark on a Term

Multiple Choice

A statistics professor wishes to estimate the average mark on a term test for a course that has
Multiple sections and many students. A survey of some of the students registered for the course
Reveals the following results:
If 95% and 98% confidence intervals were developed to estimate the true term test mean, what
Differences would exist?

A) Standard errors
B) Interval widths
C) t-values
D) Both interval widths and t-values