Question

REGRESSION ANALYSIS The owner of large chain of ice-cream stores would like to study the effect of atmospheric temperature on sales during the summer season. Temperature is the independent variable. A random sample of 21 days is selected with the results given as follows: DAILY HIGH SALES PER STORE (Y) TEMPERATURE (X) (F) DAY 48 25000 2 28000 60 3 63 28500 4 75 30500 5 80 33600 82 32500 6 7 85 36800 8 88 39000 41000 9 90 10 91 43600 11 92 44000 12 65 29200 13 98 46500 14 100 48000 15 92 38700 16 87 38300 17 84 35800 18 88 38600 19 80 32600 20 82 31400 21 76 39800 MINITAB PRINTOUT

Answer 1

Answerd: Regression equation; - ý = 812 + 436-32% Answe992: Sales per store is the dependent variable Answeri: Daily high temperature is the independent variable Answer 4: coefficient of correlation is 0.894, There is strong relationship between both variable Answer 5, 79.9 percent of the variation in sales com be explained by the variation in temperature