SVGS Stats - Quick Review

A sample of 14 identical twins are volunteers for ane experiment studying the benefits of exercise on resting heart rate

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Suppose that there is a correlation of r = 0.9 between hours studying and GPAs. Which is true?

What's the probability that a randomly selected child is from a multiple birth given that the child is left-handed?

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A model was created to predict the cost($) of a 2x8 board from its length. The slope is 0.86. What does that mean?

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Suppose data is collected on scores of high school basketball games. The IQR is 21 points. What does this mean?

In R, the get_regression_summaries() function is used to get the value of sigma.

When describing a distribution, it's OK to judge all characteristics from the graph.

In a survey of personal habits, one question that was asked was "How often do you brush your teeth?". Which is true?

Randomness on a residual plot is an indication that the model IS appropriate.

The tabyl() function is used to

What is a dummy variable?

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When comparing heights of students at different schools, we should use

P-values in models are used to determine if a variable is helpful in predicting the response variable.

Suppose that a data set has a mean of 47 and standard deviation of 14. If 4 is added to each score, then the -

If a distribution is roughly symmetric, then you should use the following statistics to measure center and spread -