Making Predictions

Question 1

What is the best estimate for the number of coats sold when the outside temperature is 35°F?

Revolt · Accepted Answer

70 coats

Question 2

What is the predicted temperature when 125 coats are sold?

Revolt · Accepted Answer

–22.9

Question 3

Which temperature values would an interpolation be limited to?

Revolt · Accepted Answer

between 0 and 60

Question 4

Quincy claims that if 80 coats are sold, the outside temperature is likely to be about 42°F. Did Quincy make a reliable prediction? If not, what was his mistake?

Revolt · Accepted Answer

No. Quincy should have used the trend line to find the corresponding x value when y=80.

Question 5

What can be concluded about the extrapolated data for this scenario? Check all that apply.

Revolt · Accepted Answer

Eventually the coat sales will be negative, which is not possible.; Eventually the temperature will increase or decrease to impossible values.; Some predictions may not be accurate.

Question 6

Use the regression for Clothes-4-You coat sales to make predictions.

Revolt · Accepted Answer

Use the regression for Clothes-4-You coat sales to make predictions.: 26.2; Use the regression for Clothes-4-You coat sales to make predictions.: –22.9

Question 7

How many coats should Clothes-4-You expect to sell when the average temperature is 80°F?

Revolt · Accepted Answer

26.2; Selection 1: 26.2; Selection 2: –22.9

Question 8

Is the sale of 90 shoes a reliable prediction when the temperature is 80°F?

Revolt · Accepted Answer

No, there’s no association between the variables.

Making Predictions Answers

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