Questions from Essentials of Statistics

Q: Do the concepts of class limits, marks, cutpoints, and

Do the concepts of class limits, marks, cutpoints, and midpoints make sense for qualitative data? Explain your answer

Q: Complete the statement: Almost all the observations in any data set

Complete the statement: Almost all the observations in any data set lie within ____ standard deviations to either side of the mean.

Q: What does Chebyshev’s rule say about the percentage of observations in any

What does Chebyshev’s rule say about the percentage of observations in any data set that lie within a. six standard deviations to either side of the mean? b. 1.5 standard deviations to either side of...

Q: A quantitative data set of size 87 has mean 80 and standard

A quantitative data set of size 87 has mean 80 and standard deviation 10. At least how many observations lie between 60 and 100?

Q: For a linear equation y = b0 + b1x, identify the

For a linear equation y = b0 + b1x, identify the a. independent variable. b. dependent variable. c. slope. d. y-intercept.

Q: The line that best fits a set of data points according to

The line that best fits a set of data points according to the least squares criterion is called the ____ line.

Q: Using a regression equation to make predictions for values of the predictor

Using a regression equation to make predictions for values of the predictor variable outside the range of the observed values of the predictor variable is called _____ .

Q: In the context of regression analysis, what is an a

In the context of regression analysis, what is an a. outlier? b. influential observation?

Q: Identify a use of the coefficient of determination as a descriptive measure

Identify a use of the coefficient of determination as a descriptive measure.

Q: For each of the sums of squares in regression, state its

For each of the sums of squares in regression, state its name and what it measures. a. SST b. SSR c. SSE