Question

The sample data for the vitamin C content in mg/100g of this year's corn soy blends are 28,14, 26, 20, and 25. The last year's mean vitamin C content was 28.5 mg/100g. A researcher thinks that this year's mean corn soy blend is different from last year. The significant level is 0.10. Carry out the test using the classical approach (Follow five steps).

Answer 1

1.

2.

3.

4. By decision rule, we reject H0.

5. That is , there is sufficient evidence to conclude that this year's mean corn soy blend is different from last year.