Deck 13: Inferential Statistics

Question 1

___________ __________ is defined as the condition of having normally distributed data in each data group.

A) Normal distribution
B) Absolute value
C) Correlation coefficient
D) Equal variance

Answer 1

D

Question 2

A ________ ___________ is defined as the strength of evidence to support the null hypothesis or how likely the difference between the two groups could have happened by accident.

A) p-value
B) statistical difference
C) t-test
D) negative correlation

Answer 2

A

Question 3

When the p-value is less than ________, there is strong evidence to reject the null hypothesis.

A) 0.005%
B) 0.05
C) 25%
D) 1%

Answer 3

B

Question 4

Which test do investigators use when their null hypothesis reflects a specific direction?

A) t-Test
B) Z-score
C) One-tailed test
D) Two-tailed test

Question 5

What percentage of the total possible values are found beneath a normal curve?

A) 0.05%
B) 95%
C) 100%
D) 2.5%

Question 6

The percentage points used in inferential statistics to reject or fail to reject the null hypothesis are called:

A) correlation coefficient.
B) t-test variables.
C) Z-scores.
D) critical values.

Question 7

The two types of t-tests are:

A) nominal and ordinal.
B) independent and paired samples.
C) chi-square and correlations.
D) type I and type II.

Question 8

What test is used to compare the mean scores of one group tested twice?

A) Correlation
B) Independent t-test
C) Paired-samples t-test
D) Chi-square

Question 9

The magnitude of the difference between the mean scores of the null hypothesis is estimated by:

A) chi-square.
B) the correlation coefficient.
C) the critical value.
D) the confidence interval.

Question 10

What type of test is used to compare the mean scores of two groups tested once?

A) Independent t-test
B) Paired-samples t-test
C) Correlation
D) Type II

Question 11

When using a two-tailed test, the normal curve is divided into three sections.

Question 12

The data used for a chi-square test are called nonparametric data.

Question 13

Degrees of freedom are defined as the number of choices, minus one for the overall category.

Question 14

If a statistical test is performed, that means we know with certainty that the hypothesized relationship exists.

Question 15

Wide dispersion of data means greater strength.

Question 16

If a t-test is used, the mean score is always derived from the whole population.

Question 17

Correlation does not mean that one variable causes another variable to change, but simply means that two things are numerically related or associated.

Question 18

There are two basic types of statistics: ______________ and _____________.

Question 19

_____________ is a branch of mathematics that focuses on data collection, analysis, and interpretation of data.

Question 20

_______________ statistics organize and summarize data without the use of complicated mathematical equations, while _____________ statistics emphasizes identifying associations and drawing conclusions about a population from a random sample of data taken from that population.

Question 21

The p-value is a number between _______ and _______.