Describe situations in which a variable's variability is best measured by the range, interquartile range, and standard deviation, providing at least two concrete examples of each.
What will be an ideal response?
Range--the true upper limit in a distribution minus the true lower limit; since the range can be drastically altered by just one exceptionally high or low value (termed the outlier), it does not do an adequate job of summarizing the extent of variability in a distribution; a version of the range statistic, the interquartile range, avoids the problem created by outliers; standard deviation is simply the square root of the average squared deviation of each case from the mean.
You might also like to view...
Angola is a sub-Saharan African country with rich natural resources. Initially, explain the main premises of world-system theory. Then, discuss how the theory might be used to explain the lack of development in Angola despite abundant natural resources. How convincing do you think this explanation is? Be sure to justify your argument.
What will be an ideal response?
Which of the following statements is true of the Jim Crow laws?
A) They empowered authorities of the Church to regulate federal legislature. B) They prohibited intimate homosexual conduct and certain other forms of sexual activity. C) They called for racial segregation in the use of public facilities. D) They essentially banned slavery in the United States. E) They prevented women from pursuing education.