Question

Write your answers in the spaces available. Unsupported correct answers cannot earn full marks. Marks are as shown. Total -10. am chain wishes to study the effect of outside temperature [10 marks] The managemen (in C)on sale (in $1000s) during summer months. The data for a sample of 21 symmer days was analyzed using t of an ice-crea phics. The result is the following (missing entries are indicated by a red cross Plot of Sales vs Outside Temperature 3.1 2.7 2.3 1.9 25 29 33 Outside Temperature e) [2 marks] The company wants to use the data to predict sales at 25,0and 37 . Which e the smallest margin of error? Briefly justify your answer (Note: it is not prediction will hav expected that you perform the actual calculations).

Answer 1

e) mean of x is around 30

farther away from mean, largest margin of error

hence

30 will have smallest margin of error