Inferential Statistics

Observed value= calculated value.

Critical value= value calculated from data.

Directional hypothesis= one-tailed test.

Non-directional= two-tailed test.

Significance level= 5% level (0.05)

Type 1 error (10%)= too lenient, rejected null hypothesis which should've been accepted.

Type 2 error (1%)= too strict, accept null hypothesis which should have been rejected.

1. State alternative and null hypothesis.

2. Record data, rank each co-variable, calculate the difference.

3. Find observed value.

4. Find critical value.

5. State conclusion.

1. State alternative and null hypothesis.

2. Draw contingency table.

3. Compare observed and expected frequencies for each cell.

4. Find observed value.

5. Find critical value.

6. State conclusion.

1. State alternative and null hypotheses.

2. Record data in table and allocate points.

3. Find observed value of U.

4. Find critical value of U.

5. State conclusion.