Basic Statistics Self Test

A researcher is interested in the travel time of CTU students to college. A group of 50 students is interviewed. Their mean travel time is 16.7 minutes. For this study the mean of 16.7 minutes is an example of a:

• Parameter

• Statistic

• Population

• Sample

A researcher is curious about the IQ of students at CTU. The entire group students is an example of a:

• Parameter

• Statistic

• Population

• Sample

Statistical techniques that summarize and organize the data are classified as:

• Population statistics

• Sample statistics

• Descriptive statistics

• Inferential statistics

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?

• Independent variable

• Dependent variable

• Outcome variable

• Resultant variable

Five-point Likert scales (strongly disagree, disagree, neutral, agree, strongly agree) are frequently used to measure motivations and attitudes. A Likert scale is a:

• Discrete variable.

• Ordinal variable.

• Categorical variable.

• All of the above options (A, B and C)

In a 500m speed skating race, time results would be considered an example of which level of measurement?

• Nominal

• Ordinal

• Interval

• Ratio

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?

• Statistical error

• Inferential error

• Residual error

• Sampling error

A researcher studies the factors that determine the number of children future couples decide to have. The variable ‘number of children’ is a(n):

• Discrete variable

• Continuous variable

• Categorical variable

• Ordinal variable

A teacher asks students to identity their favorite reality television show. What type of measurement scale do the different television shows make up?

• Nominal

• Ordinal

• Interval

• Ratio

The median is always:

• The most frequently occurring score in a data set

• The middle score when results are ranked in order of magnitude

• The same as the mean

• The difference between the maximum and minimum scores.