Question: In a previous position with the NCAA you carried out research to determine if success on the basketball court was related to intelligence. In a study of 30 athletes, you obtained an r = 0.359? What conclusions did you draw?
Question: In a study of 100 college students, you calculated an experimental Pearson’s Correlation Coefficient r = 0.211 in an attempt to determine if there is a correlation between alcohol consumption and date rape. What conclusions did you draw?
Question: You have conducted a study to determine if the average time spent in the computer lab each week and the course grade in a computer course were correlated. Using the data given below, what conclusion would you draw on this issue. student # hours in lab Course Grade 1 20 96 2 11 51...
Question: You are a graduate research assistant working with Dr. Bugg, a renowned zoologist. As part of your Ph. D. general examination, Dr. Bugg asked you to predict the temperature when the chirping rate for a cricket is 1,000 chirps per minute. To accomplish this you collect a “bunch” of crickets and measure their chirping...
Question: Based on the data from six students, the regression equation relating the number of hours of preparations (x) and test score (y) is \[\hat{y}=67.3+1.07x\]. The same data yield an r = 0.224 and a \[\bar{y}=75.2.\] What is the best predicted test score for a student who spent 3 hours preparing for the test? Think...
Question: The following data consist of test scores of 6 randomly selected students and the number of hours they studied for the test. Using these data determine the linear correlation coefficient and if there is a correlation between hours of study and scores on the test. Hours 5 10 4 6 10 9 Score 64...
Question: (10 marks). It is suspected that brushing teeth straight after eating a meal has a detrimental effect on enamel loss. To explore this theory, 15 pairs of twins performed two tests. One of the twins (twin 1) did tooth brushing 30 min after each meal, while the other twin (twin 2) brushed teeth straight...
Question: A study was completed that examined the relationship between coffee consumption and level of stress for a group of 50 undergraduates. The correlation was .373, and it was a two-tailed test, done at the .01 level of significance. First, is the correlation significant? Second, what’s wrong with the following statement? “As a result of...
Question: Use the following set of data to answer the following questions. a. Compute the correlation between age in months and number of words known. b. Test for the significance of the correlation at the .05 level of significance. c. Go way back and recall what you learned about correlation coefficients and interpret this correlation....
Question: (10 marks) The number of patients visiting the dental departments of two District General Hospitals in a total of 14 equal sample time period is Hospital A: 8 12 7 15 9 10 11 13 10 14 9 12 11 12 Hospital B: 11 6 8 12 7 6 9 10 8 10 7...
