Refer to Exercise 1, where we are trying to link daily temperature (x) and coffee sales (y). The estimated regression equation turned out to be ˆy = 660 – 6.8x. Show the 90% confidence interval estimate of average coffee sales for all days with a high temperature of 68 degrees.
Answer to relevant QuestionsFor a simple linear regression analysis attempting to relate consumer confidence (y) to the unemployment rate (x), the following data are available: Show the data in a scatter diagram and use the least squares criterion to ...Refer to Demonstration Exercise 11.1, where we are trying to link tolerance for risk (x) to % of financial assets invested in the stock market (y). The estimated regression equation turned out to be yˆ = 20 + 3.5x. Show the ...Plot the data and show the least squares line and the corresponding estimated regression equation. Given the line that you’ve drawn, about how much do support costs appear to increase with each 1000 square foot increase in ...Plot the data and show the least squares line and the corresponding estimated regression equation. Given the line you’ve drawn, about how much does the number of late or missed payments appear to fall as credit score ...A recent article in a national business magazine reports that a strong linear connection appears to exist between regional unemployment rates and property crime. The following data were collected from four sample regions to ...
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