Does a country’s gross domestic product (GDP) indicate its level of technology? The CIA World Factbook [https://www.cia.gov/] provides statistics on all world countries. The following 2008 information was obtained for a random sample of five countries:
Find r and set a 95% confidence interval for r.
Answer to relevant QuestionsThe test–retest method is one way of establishing the reliability of a test. The test is administered, and then, at a later date, the same test is readministered to the same individuals. The correlation coefficient is ...a. State the standard null hypothesis, Ho, for testing the linear correlation coefficient, p. b. What does a decision of “Fail to reject Ho” indicate in a hypothesis test for p? c. What does a decision of “Reject Ho” ...a. If a sample of size 10 has a linear correlation coefficient of 0.60, is there significant reason to conclude that the linear correlation coefficient of the population is positive? Usea = 0.01 . b. If a sample of size 42 ...Consider the “Married Couples’ Heights” scatter diagram presented in “Height Compatibility” on page 613: a. Calculate r. b. Set a 95% confidence interval for r. c. Test for a significant positive correlation at the ...The following data show the number of hours studied for an exam, x, and the grade received on the exam, y (y is measured in 10s; that is y = 8, means that the grade, rounded to the nearest 10 points, is 80). a. Draw a ...
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