Researchers Were Interested in Finding Out How the Respiratory Parameters

question 4

Multiple Choice

Researchers were interested in finding out how the respiratory parameters in a group of individuals who were diagnosed with asthma responded to a six-week aerobic training intervention. Forced expired ratio (FER, %) is the product of the forced expired ratio in 1 second (FEV₁, litres) divided by the forced vital capacity (FVC, litres) and was the parameter the researchers were most interested in. The results are presented below. Enter the data into SPSS and plot a bar chart representing the mean of the pre- and post-test data. Add the 95% confidence intervals for the mean. You should get the bar chart shown below. What does the 95% confidence interval (CI) that you have plotted refer to?

• A) 95% confidence that the mean will fall between these intervals
• B) 95% confidence that all data points fall between these intervals
• C) 95% confidence that all data points fall outside these intervals
• D) 95% confidence that the range falls between these intervals

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Definitions:

Cost Equation

An equation that reflects the relationship between costs, production volume, and other factors, often used for predicting costs at various levels of activity.

Two Points

In finance, two points refer to a one percent change in the face value of a financial instrument like a loan or mortgage, often related to fees or interest rates.

Variable Cost Per Unit

The cost that changes with the level of output or production, expressed on a per unit basis.

Total Fixed Costs

The sum of all costs that remain constant regardless of the level of production or sales volumes.