Question

1. For a one-factor ANOVA comparing the effect of four different treatments on a recovery time from a physical injury, what is stated by the alternative hypothesis (H₁)?

• A. One treatment is significantly more effective in shortening the recovery time.

• B. There are some significant differences in recovery time after the four treatments.

• C. All treatments are equally effective in shortening the recovery time.

• D. There is no significant difference in recovery time after the four treatments.

2.For a one-factor ANOVA comparing the effect of four different treatments on a recovery time from a physical injury, what is stated by the null hypothesis (H₀)?

• A. All four treatments result in a significantly different recovery time.

• B. There are some significant differences in recovery time after the four treatments.

• C. There is no significant difference in recovery time after the four treatments.

• D. One treatment is significantly more effective in shortening the recovery time.

3. In a one-factor ANOVA for independent samples, the effect of treatment contributes to which of the following variances?

• A. Both between-groups variance and within-groups variance.

• B. Between-groups variance .

• C. Within-groups variance.

• D. None of the above.

4. In one-factor ANOVA for independent samples, the estimation of how much groups can be expected to differ by chance is provided by which component of the F ratio?

• A. both, the numerator and denominator (i.e., both between-treatments variance and within-treatments variance).

• B. the denominator (i.e., within-treatment variance).

• C. the numerator (i.e., between-treatment variance).

Answer 1

1) A) One treatment is significantly more effective in shortening the recovery time.

2) C) There is no significant difference in recovery time after the four treatments.

3) B) Between-groups variance .

4) B) the denominator (i.e., within-treatment variance).