If 95% and 98% Confidence Intervals Were Developed to Estimate

Multiple Choice

If 95% and 98% confidence intervals were developed to estimate the true cost of an MP3 player with a known population standard deviation,what differences would they have?

A) The standard errors would be different.
B) The point estimates of the population mean would be different.
C) The sample sizes would be different.
D) The z-statistics would be different.