/42986?module_item_id=2191188 Question 23 You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 90% confident that you estimate is within 3% of the true population proportion. How large of a sample size is required? Submit Question 63OF O hp prt sc delete 10 DDI 9 144 6 backspace 5 & % 5 Pm/courses/26867/assignments/7429867module_ item_id- 2191188 Question 31 Using your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported as y - 54.771 + 87.42 and the T 0.09. What percentage of the variation in y can be explained by the variation in the values of x? (Report exact answer, and do not enter the % sign) Submit Question 63 F ~ 9 4 5064 hp delete insort sc $12 10 144 A+ Dac 6 & 9 5module_item id=2191188 The data below is 11 observations of Fall semester student credit hours (x) and Spring semester student credit hours (y). Calculate the linear correlation coefficient, 7. Enter your answers to two decimal places. X hours hours 13 16 10 5 6 2 11 12 7 11 12 16 9 11 8 8 16 15 5 2 15 12 Submit Question 63OF O hp insort sc delete 10 DRI 19 8 + backspace & 5