Deck 11: t(ea) for Two (Again): Tests Between the Means of Related Groups

Question 1

What is used to examine the degree of relationship between variables?

A) Hypothesized mean difference
B) Pearson correlation
C) Observations
D) Variance

Answer 1

A

Question 2

What is the test statistic calculated by the statistical procedure selected known as?

A) Critical value
B) Significance level
C) Obtained value
D) p value

Answer 2

C

Question 3

In the formula that computes a t value, what does n?D represent?

A) Sum of the difference between groups
B) Sum of the means for Group 1
C) Sum of the means for Group 2
D) Sum of the differences squared

Answer 3

B

Question 4

When comparing two groups the term independent explains that:

A) One group is compared to other similar groups
B) One group is compared to dissimilar groups
C) Two groups are related
D) Two groups are not related in any way

Question 5

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

A) Reject the null hypothesis
B) Accept the null hypothesis
C) Reduce the p value
D) Decrease your sample

Question 6

What is the formula used to calculate degrees of freedom for a t test for dependent groups?

A) n? - 1
B) n? + n? - 1
C) n? - 1 + n?
D) n? + n?

Question 7

In the following, what are the degrees of freedom: t???? = 2.001, p < .05?

A) 29
B) 30
C) 31
D) 32

Question 8

In a t test for dependent samples that examine the difference between a pretest and posttest, what type of hypothesis is used?

A) Nondirectional
B) Directional
C) Null
D) Research

Question 9

In order to compute the test statistic or t value, you must first approximate the sample size through calculating which of the following?

A) Pooled variance
B) Standard deviation
C) Degrees of freedom
D) Mean score

Question 10

What Excel function requires that you enter the t value, degrees of freedom, and the number of tails?

A) TTEST
B) TEST2
C) TDIST
D) TDIST2

Question 11

In order to be 99% confident you have not committed a Type I error, at what level should you set your p value?

A) .01
B) .10
C) .05
D) .15

Question 12

What does the Excel function TTEST compute?

A) t value
B) Probability of the t value occurring
C) Critical t value
D) Obtained t value

Question 13

Which of the following represents degrees of freedom?

A) fd
B) df
C) d
D) f

Question 14

Examining one group of subjects under two different conditions would require what statistical technique?

A) Regression
B) t test for dependent samples
C) Analysis of variance
D) t test for independent samples

Question 15

Which of the following relates to the difference you expect?

A) Hypothesized mean difference
B) Pearson correlation
C) Observations
D) Variance

Question 16

How many observations are there for each case in a t test for dependent samples?

A) One
B) Two
C) Three
D) Four

Question 17

To determine whether you will reject the null hypothesis, the test statistic must be compared against the:

A) Critical value
B) Significance level
C) Obtained value
D) p value

Question 18

What is another name for a dependent samples t test?

A) Paired sample
B) Two sample
C) Independent sample
D) Freed sample

Question 19

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

A) Reject the null hypothesis
B) Accept the null hypothesis
C) Set a higher p value
D) Increase your sample

Question 20

How many subjects were examined based on the following: t???? = 2.001, p < .05?

A) 29
B) 30
C) 31
D) 32

Question 21

What does the t test for dependent samples allow you to examine?

Question 22

What is another term that statisticians use when talking of dependent tests? Explain.

Question 23

What does P(T<=t) two-tail represent?

Question 24

When using the Amazing Analysis ToolPak to compute t value for dependent samples, which test should you select?

Question 25

What does t critical one-tail represent?

Question 26

What is the formula for calculating a t value for a dependent samples test?

Question 27

Explain the difference between a test of dependent and independent means.

Question 28

Given the following, what should you conclude? t???? = 2.001 and tc??t?c?l = 1.94

Question 29

What does t stat represent?

Question 30

Consider the following set of conditions: The focus is the difference between scores on a pretest and a posttest, the participants are being tested more than once, and there are two groups. Which test should you use?