Question

High Temperature (°F)	Number of cans sold
55	340
58	335
64	410
68	460
70	450
75	610
80	735
84	780

1. A convenience store manager notices that sales of soft drinks are higher on hotter days, so he assembles the data in the table.

(a) Make a scatter plot of the data below.

(b) Sketch the best fit line and write the equation for that line.

Equation:______________________________________

(c) Use the model to predict soft-drink sales if the temperature is 95°F.

(d) Using the scatterplot, describe the association you see between the two variables. Guess your r, (Remember r is not the same as slope!) Make sure to mention direction and strength.

graph

Answer 1

Above problem is solved usit Minitab, output of Minitab is attached below,

a) see the scattere plot is output

b) Regression Eq.

Cans Sold = -622 +16.42 * High Temp

c) Cans Sold = -622 +16.42 * 95 = 937.9

d) if we saw the scattere plot it is clear that there is positive association bet cans sold ans Temp.

Roughly association is nearby perfect positive that is near to 1 or lies between 0.9 to 1

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