ExtraCredit Statistics Worksheet. (upto 15 points)

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

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

Statistical techniques that summarize and organize the data are classified into what two branches of statistics:

• A. Population statistics

• B. Sample statistics

• C. Descriptive statistics

• D. 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?

• A. Independent variable

• B. Dependent variable

• C. Outcome variable

• D. Resultant variable

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

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

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

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

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.

The seminar rooms in the library are identified by the letters A to H. A researcher records the number of classes held in each room during the first semester. What kind of graph would be appropriate to present the frequency distributions of these data?

• A. Histogram

• B. Scatterplot

• C. Bar chart

• D. Box plot