问一道题~~~ freedom, class, increase, following

youven

Q10 Which of the following changes in sample size and degrees of freedom, respectively, is most likely to result in an increase in the width of the confidence interval for the population mean?

 

	Sample size	Degrees of freedom
A	Increase	Increase
B	Increase	Decrease
C.	Decrease	Increase
D	Decrease	Decrease