Jack Wants to Test If Runners on His Cross-Country Team

question 54

Multiple Choice

Jack wants to test if runners on his cross-country team improve with his new training regimen. He takes their times at the beginning of the season and again at the end of the season.
-Which of the following designs is Jack best illustrating?

• A) One-shot case study
• B) One-group pretest-posttest design
• C) Pretest-posttest control group design
• D) Time series design

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Definitions:

Mean Squared Error

A measure of the average squared differences between estimated and actual values, used to evaluate the accuracy of statistical models.

Exponential Smoothing

A time series forecasting method for univariate data that applies weighing factors which decrease exponentially over time.

Mean Absolute Deviation

A measure of variability that indicates the average distance between each data point and the mean of the data set.

Forecasting Methods

Techniques used to predict future events or trends based on analysis of past and present data, crucial in planning and decision-making processes.