The financial industry Earnings average per share last year were $3. This year, earnings per share in 10 financial companies were as follows.

1. The financial industry Earnings average per share last year were $3. This year, earnings per share  in 10 financial companies were as follows. Test the hypothesis that this year's earnings differ (higher or lower) from last year - two tail, at alpha (significance level) =.01

Data 1.92, 2.16, 3.63, 3.16, 4.10, 3.14, 2.20, 2.34, 3.10, 2.38

a. Hypothesis being tested is Mean=3 . is it one or two tails?

1. Critical Value T or Z
2. What is the appropriate
3. Statistical conclusion
4. Practical conclusion