In a Nanos Research survey of 1000 Canadian adults about how favourable they were toward the Alberta oil sands project. The responses were "favourable", "somewhat favourable", "somewhat unfavourable", "unfavourable and "unsure". Grouping "favourable" and "somewhat favourable" together, the percentages vary by geography, gender and age group.

	Number Surveyed	Percentage favourable or somewhat favourable
Atlantic	150	36.40%
Quebec	300	41.80%
Ontario	250	48.10%
Prairies	150	59.80%
British Columbia	150	32.20%
Male	600	50.90%
Female	400	39.40%
18-29	200	42.00%
30-39	175	44.00%
40-49	196	50.00%
50-59	184	42.30%
60 plus	245	48.60%

a) Construct 95% confidence intervals for each geographical region and compare them geographically.

b) Construct a 99% confidence interval for the difference between the Prairies (where favourability is highest) and the Atlantic provinces (where favourability is lowest) and interpret its meaning.

c) Conduct a similar analysis for the age groups (using sub-questions a and b)

NOTE: Use age groups 50-59 and 60+ for the 99% confidence interval at b.

d) Are you 99% confident there is a difference between men and women.

e) Write a report summarizing what this survey indicates about differences in favourability to the Alberta Oil Sands project by geography, gender, and age group.