8.69 Natural versus artificial Christmas trees.
CASE 8.2 In the Christmas tree survey introduced in Case 8.2 (page 428), respondents who had a tree during the holiday season were asked whether the tree was natural or artificial. Respondents were also asked if they lived in an urban area or in a rural area. Of the 421 households displaying a Christmas tree, 160 lived in rural areas and 261 were urban residents. The tree growers want to know if there is a difference in preference for natural trees versus artificial trees between urban and rural households. Here are the data:
Population | (natural) | |
---|---|---|
1 (rural) | 160 | 64 |
2 (urban) | 261 | 89 |
8.69
(a) . (b) . The data do not show a difference in preference for natural trees versus artificial trees between urban and rural households. (c) (−0.021, 0.139).