The value of t will increase as the standard deviation of difference___ and the difference between means___.

Increases; decreases

Increases; Increases

Decreases; decreases

Decreases; Increases

1- is the probability of_______

Rejecting a true null hypothesis

Accepting a true null hypothesis

Accepting a false null hypothesis

Rejecting a false null hypothesis

We can use pairwise comparison if we want to compare the means between the average GPA in 8 different schools.

yes

no

Which of the following descriptions about t distribution is correct (select only one)?

Compared to the normal distribution, the t distribution has more values at the top and fewer at the tail.

Compared to the normal distribution, the t distribution has fewer values at the top and more values at the tail.

T distribution always has the same shape with a normal distribution

T distribution is extremely right-skewed