The Difference between Two Means

Question 1 out of 9.

The graphs show a violation of the assumption of (check all that apply)

1. normality
2. homogeneity of variance

Question 2 out of 9.

The graphs show a violation of the assumption of (check all that apply)

1. normality
2. homogeneity of variance

Question 3 out of 9.

The graphs show a violation of the assumption of (check all that apply)

1. normality
2. homogeneity of variance

Question 4 out of 9.

In the formula for $t$, the "statistic" is

1. the null hypothesis.
2. the mean of all numbers.
3. the difference between sample means.
4. the significance level.

Question 5 out of 9.

In the formula for $t$, the "hypothesized value" is

1. what you expect the $t$ to be.
2. the difference between population means.
3. the significance level.

Question 6 out of 9.

If the null hypothesis is that two population means are equal, then the hypothesized value is

1. 0.
2. the population mean.

Question 7 out of 9.

The denominator in the $t$ test formula is

1. the estimated standard error of the mean.
2. the estimated standard error of the difference between means.
3. MSE/2

Question 8 out of 9.

If there are 4 scores per group and the $t$ value is 2.34, what is the $p$ value for a two-tailed test (to 3 decimal places)?

___________

Question 9 out of 9.

What is the t for an independent-groups $t$ test for these data?

___________

 G 1	 G 2
 46	 28
 59	 37
 53	 40
 35	 34
 43	 29
 28	 46
 59	 26
 51	 41