# STATS CH 11

A researcher wants to compare create an intervention to improve the well being of first-semester graduate students, so she gives the professional school counseling students specific doses of rocky road ice cream, and the mental health counseling students

Independent samples t test

The t test for independent means is used when each group is tested ____________.

only once

If your obtained t value is 7.14 and the critical value is 6.10, what decision should you make?

Reject the null hypothesis

A measure of how different two groups are from one another in their magnitude is the __________.

Effect size

The t statistic value is also called the _____________.

...

In order to compute the test statistic or t value, you must first approximate the sample size by calculating the

Degrees of freedom

Which major assumption of the t test deals with the amount of variability in each group?

Variances are equal

Imagine you are looking up a critical t value in a t table. If your observed t value for the degrees of freedom lies between two critical values in the table, to be conservative you would select __________________________.

The smaller value

If you want to examine the difference between the average scores of three unrelated groups, which of the following statistical techniques should you select?

...

What does the number 58 represent in the following: t(58) = 2.001, p < .05?

Degrees of freedom

What is the assumption that the amount of variability in each of the two groups is equal?

Homogeneity of variance

In order to determine whether or not you will reject the null hypothesis, the test statistic must be compared against the _____

Critical value

The t test for independent means is used when you are looking at the difference in average scores of one or more variables between _______ groups that are ____________ of one another.

two, independent

What is considered to be a small effect for Cohen's d?

...

If the obtained value is greater than the critical value, what should you do?

...

If the number of participants in group one = 32 and the number in group two = 30, what is the associated degrees of freedom?

60

That same researcher had a third group of students�those studying College Student Affairs�who the faculty thought ought to be tested in the next study. The researcher decided to give the first-semester College Student Affairs graduate students specific do

Analysis of variance

In the t test for independent samples, the actual statistical test is__________________.

Nondirectional

When computing effect size, the sample size is ________.

Not taken into account

If the number of participants in group one = 54 and the number in group two = 58, what is the associated degrees of freedom?

110