Question:
The table below gives two samples selected from 10 supermarkets of the weekly sales of a popular soft drink. The first sample gives the details for a normal shelf display of the product, while the second sample gives the details for an end-aisle shelf display. Assuming equal variances, establish, at the 5% level of significance, whether there is a statistically significant difference in the mean weekly sales for the two display locations.
|
Normal display
|
End-Aisle Display
|
|
22
|
52
|
|
34
|
71
|
|
52
|
76
|
|
62
|
54
|
|
30
|
67
|
|
40
|
83
|
|
64
|
66
|
|
84
|
90
|
|
56
|
77
|
|
59
|
84
|