off) G Stat 1350 Final Exam Autumn 2021.dotx - Saved to this PC . Search Jenny Kitchen JK Home Insert Draw Design Layout References Mailings Review View Help Share Comment K. What proportion of variation can be explained by the linear relationship between the two variables? Has that increased or decreased since the outliers have been removed? Do we have evidence that there is a relationship between price and printing speed now that the outliers have been removed? How can you tell? onfidence Intervals Quebec is a large province in eastern Canada and is the only province whose residents primarily speak French. The debate about whether the province should succeed from Canada and create their own county has ebbed and flowed over the years. In a recent survey of 3,600 Quebec residents, 26% said that Quebec should separate from Canada. In the same survey, 79% agreed that Quebec society is unique from the rest of Canada. a. Find the 90% confidence interval for the proportion of residents that would like to form their own country. b- What does that tell us about the status of the debate? C. Find the 90% interval for the proportion of residents that believe that Quebec has a distinct society. d. What that tell us about the status of the debate? e. Overall, what does the two confidence intervals tell us about the status of the debate? f. If you increased the confidence level to 95%, would the length of the interval increase or decrease? Explain. 3. The researchers surveyed 3,600 Quebecers. What could the researchers do to shorten the length of confidence interval without changing the confidence level? Explain. h. If the researchers wanted to reduce the margin of error by half, how many people would they need to survey? Would that be realistic? Why or why not? ference and Hypothesis Tests Our random number table is supposed to have the numbers 0 through 1 distributed through the table with equal probability. If this is true, then the mean of all the numbers on the table will be 0.50. You want to test th claim, so you collect a sample of 100 random numbers. You find that the mean is 0.460 with a standard deviation of 0.020. a. Is this strong evidence that the mean of all the numbers on the table is not 0.50? FOCUS 1 6 DX x Accessibility: Investigate 9:01 PM 47 " F ~090(1 12/14/202 Type here to search O