MATH 225N WEEK 8 FINAL EXAM Questions,Answers & Explanation

Answer Explanationr≈−0.81The correlation coefficient, rounded to two decimal places, is.xThe table below contains the geographic latitudes,, and average Januaryy20temperatures,, ofcities. Use Excel to find the best fit linear regressionequation. Round the slope and intercept to two decimal HelpCopy to ClipboardDownload CSVYes that's right. Keep it up!y =−2.68,x147.24Thus, the equation of line of best fit with slope and intercept rounded to twoyˆ=−2.68x+147.24decimal places is.An organization collects information on the life expectancy (in years) of a personin certain countries and the fertility rate per woman in those countries. The data forrandomly selected countries for the yearis given below. Use Excelto find the best fit linear regression equation, where fertility rate is the explanatoryvariable. Round the slope and intercept to two decimal places.Answer Explanationyˆ=−4.21, x+83.68y =−4.21,x83.68.An economist is trying to understand whether there is a strong link between CEOpay ratio and corporate revenue. The economist gathered data including the CEO30pay ratio and corporate revenue forcompanies for a particular year. The payratio data is reported by the companies and represents the ratio of CEOcompensation to the median employee salary. The data are provided below. UserExcel to calculate the correlation coefficientbetween the two data sets. Roundyour answer to two decimal places.Perfect. Your hard work is paying off?−0.17r=r≈−0.17The correlation coefficient, rounded to two decimal places, is.A researcher is interested in whether the variation in the size of human beings isproportional throughout each part of the human. To partly answer this questionthey looked at the correlation between the foot length (in millimeters) and height30(in centimeters) ofrandomly selected adult males. The data is providedrbelow. Use Excel to calculate the correlation coefficientbetween the two datasets. Round your answer to two decimal places.Great work! That's correct.0.50r=r≈0.50The correlation coefficient, rounded to two decimal places, is.The table below gives the average weight (in kilograms) of certain people120ages-. Use Excel to find the best fit linear regression equation, where ageis the explanatory variable. Round the slope and intercept to two decimal places