Interval Data

Interval Data

A courier service in a large city tracks the number of deliveries they are asked to make by 10 clients both before and after offering a progressive discount for repeat business.  Their goal is to assess the effects of the discount.  

 

Before

After

1

0

10

2

20

20

3

10

0

4

25

50

5

0

0

6

50

75

7

10

20

8

0

20

9

50

60

10

25

35

  1. What is the most appropriate statistical test in this situation? Why?
  2. Are there significant differences in the number of deliveries?
  3. If the goal is to promote repeat business, should the discount be continued?

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