12.4.2. Test the hypothesis that the average of the true yields forthe first three varieties of com described iil QuestKln 12.24 is the same as the average for the last two. Let a = 0.05.
12.4.3. InC.ase Study 12.2.1test the hypothesis that the average of the heart rates for light and moderate smokers is the same as that for heavy smokers. Let the level of significance be 0115.
12.4.4. To compare three investment funds, $2000 per year was invested in each fund during the period 2000-2004. The total return for such a fund is defined as the sum of equity growth plus dividends less fees. The funds are divided into three types-equity income, growth and income. and growth. The following table gives the total return for six funds of each type. Test the hypothesis that the average total return for the two growth funds isthe same as the equity fund. Let a = 0.10.
Growlh and Income
Note: SSE = 15,725,226.
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