0 Question 29 v > The correlation coefficient, 'r, is a number between 0 0 and 1 O co and on O 0 and 10 O -10 and 10 O 0 and 100 O -1 and 1 O 0 and 00 Check Answer 0 Question 23 v ' > ' [Z 1 pt '0 1 6) Details Answer the following True or False: A researcher wants to test the hypothesis that college students weigh less on average than the average American (160 lbs). The sample mean of the 80 students who were weighed was found to be 142 pounds and the P-value was 0.03. This means that if the mean of all students' weight is 160 lbs, then there would be only a 3% chance that a randomly selected group of 80 students would have a mean weight of less than 142 lbs. 0 true 0 false : CheckAnswer 0 Question 21 v i > i a 2 pts '01 (9 Details A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. 0f the 568 randomly selected Americans surveyed, 368 were in favor of the initiative. Round answers to 4 decimal places where possible. a. With 90% confidence the proportion of all Americans who favor the new Green initiative is between C] and [:]. b. If many groups of 568 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About C] percent of these confidence intervals will contain the true population proportion of Americans who favor the Green initiative and about C] percent will not contain the true population proportion. l CheckAnswer l 0 Question 30 v i l 84pm '0 1 (D Details - where not met in 200 iterations Listed below are paired data consisting of amounts spent on advertising (in millions of dollars) and the profits (in millions of dollars). Determine if there is a significant negative linear correlation between advertising cost and profit . Use a significance level of 0.01 and round all values to 4 decimal places. Advertising Cost 9 34 Ho:p=0 Ha:p