Question: please help with short explanation, thanks! Question 7 1 pts You measured the following life spans (in days) for a certain standard inbred laboratory strain

please help with short explanation, thanks!

Question 7 1 pts You measured the following life spans (in days) for a certain standard inbred laboratory strain of a lab mouse. 813, 1125, 1074, 1025, 759 Calculate a 95% lower-bound confidence interval for the live span. What is its lower bound? Round your answer to the nearest integer. Question 8 1 pts Find the least squares regression line for the data X 1 2 3 4 8 What is the slope of this regression line? Round your answer to 1 digit after the decimal point. Question 9 1 pts Find the coefficient of determination between x and y for the data X 2 3 4 2 4 5 8 Round your answer to 2 digits after the decimal point

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