When testing for differences of means,you can base statistical inference on the
A)Student t distribution in general
B)normal distribution regardless of sample size
C)Student t distribution if the underlying population distribution of Y is normal,the two groups have the same variances,and you use the pooled standard error formula
D)Chi-squared distribution with ( + - 2)degrees of freedom

Question

When testing for differences of means,you can base statistical inference on the
A)Student t distribution in general 
B)normal distribution regardless of sample size 
C)Student t distribution if the underlying population distribution of Y is normal,the two groups have the same variances,and you use the pooled standard error formula 
D)Chi-squared distribution with ( + - 2)degrees of freedom

Quizplus · Accepted Answer

When testing for differences of means, statistical inference should be based on the Student t distribution if the underlying population distribution of Y is normal, the two groups have the same variances, and the pooled standard error formula is used.

When Testing for Differences of Means,you Can Base Statistical Inference