Exam 2 (Chapters 8-9, 12)

Question 1

What are the two types of statistics?

Answer 1

Descriptive and inferential.

Question 2

What do inferential statistics give us?

Answer 2

The ability to make generalizations about population.

Question 3

What are the THREE measures of central tendency?

Answer 3

Mode, median, and mean.

Question 4

What are outliers?

Answer 4

Extremely different scores.

Question 5

What does a Chi squared statistic test?

Answer 5

Nominal data.

Question 6

What does ANOVA stand for?

Answer 6

Analysis of variance.

Question 7

How many groups is ANOVA used for?

Answer 7

More than 2 groups.

Question 8

What are the TWO ANOVA measures of variance?

Answer 8

Systematic and error.

Question 9

What is systematic variance?

Answer 9

The comparison of the means of different groups to the overall mean of your sample.

Question 10

What is error variance?

Answer 10

Looking at individuals and comparing their scores to the group they’re in.

Question 11

What is the mode?

Answer 11

The most frequent number.

Question 12

What is the median?

Answer 12

The middle number when the data is placed in ascending order.

Question 13

What is the mean?

Answer 13

The average.

Question 14

In correlations, the _________ is the strength and the __________ tells you the direction.

Answer 14

number; sign.

Question 15

In normal distribution, where do most of the scores lie?

Answer 15

In the middle.

Question 16

List the parts of an APA research paper in order:

Answer 16

Title page, abstract, introduction, method, results, discussion, and references.

Question 17

In an APA paper, the titles should be in __________.

Answer 17

bold

Question 18

What is probability?

Answer 18

The likelihood of rejecting a null when it is true.

Question 19

What is the most commonly used probability/alpha level?

Answer 19

0.05%

Question 20

What is effect size?

Answer 20

Magnitude of the effect of the I.V.

Question 21

If the probability is ___________ 0.05%, you should _________ the null.

Answer 21

less than; reject

Question 22

If the probability is _________ 0.05%, you should ____________ the null.

Answer 22

more than; accept

Question 23

What does a null hypothesis indicate?

Answer 23

No effect or difference in results.

Question 24

what does a research hypothesis indicate?

Answer 24

Difference or effect in results.

Question 25

What is a Type 1 Error?

Answer 25

Rejecting a null hypothesis when it is true.

Question 26

How do you avoid a Type 1 Error?

Answer 26

Lowering the alpha value.

Question 27

What is a Type 2 Error?

Answer 27

Accepting a false null hypothesis.

Question 28

How do you avoid a Type 2 Error?

Answer 28

Using a bigger sample.

Question 29

What is a T-Test used to measure?

Answer 29

2 groups.

Question 30

What is the “p value”?

Answer 30

Significance level.