# Quick statistics test

This test covers basic concepts such as descriptive statistics, inferential statistics, discrete variable, ordinal variable, categorical variable, population, parameter and samples.

## Population, parameter and sample.

1. A researcher is interested in the travel time of Utrecht University students to college. A group of 50 students is interviewed. Their mean travel time in 16.7 minutes. For this study the mean of 16.7 minutes is an example of a(n)
A. Parameter
B. Statistic
C. Population
D. Sample
2. A researcher is curious about the IQ of students at the Utrecht University. The entire group students is an example of a:
A. Parameter
B. Statistic
C. Population
D. Sample

## Descriptive statistics and inferential statistics.

3. Statistical techniques that summarize and organize the data are classified as:
A. Population statistics
B. Sample statistics
C. Descriptive statistics
D. Inferential statistics
4. A sports psychologist was interested in the effects of a six-week imagery intervention on an athlete’s ability to execute a sport-specific skills such penalty taking in football. How might you define the imagery variable?
A. Independent variable
B. Dependent variable
C. Outcome variable
D. Resultant variable

## Discrete variable, ordinal variable and categorical variable.

5. Five-point Likert scales (strongly disagree, disagree, neutral, agree, strongly agree) are frequently used to measure motivations and attitudes. A Likert scale is a:
A. Discrete variable.
B. Ordinal variable.
C. Categorical variable.
D. All of the above options (A, B and C)
6. In a 500m speed skating race, time results would be considered an example of which level of measurement?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
7. IQ tests are standardized so that the mean score is 100 for the entire group of people who take the test. However, if you select a group of 50 who took the test, you probably would not get 100. What statistical concept explains the difference between the two means?
A. Statistical error
B. Inferential error
C. Residual error
D. Sampling error
1. A researchers studies the factors that determine the number of children future couples decide to have. The variable ‘number of children’ is a :
A. Discrete variable
B. Continuous variable
C. Categorical variable
D. Ordinal variable
2. A teacher asks students to identity their favorite reality television show. What type of measurement scale do the different television shows make up?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
3. The median is always:
A. The most frequently occurring score in a data set
B. The middle score when results are ranked in order of magnitude
C. The same as the mean
D. The difference between the maximum and minimum scores.

## Done testing yourself? See the correct answers below. * Andy Field, Discovering Statistics using SPSS. 4th ed. Chapt. 1-3; 7.4-7.4.2; 8.1-8.4; 9.1-9.5

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