Two schedules for giving rest were comparedthe massed schedule and the spaced schedule. Twenty observations of the spaced schedule produced a mean of 26 errors. On the massed schedule 14 observations resulted in a mean of 36 errors. Anlevel of .05 was adopted and anF =4.21 was obtained. What conclusion is appropriate?

1 spaced practice produces fewer errors than massed practice.

2 massed practice produces fewer errors than spaced practice

3 the null hypothesis should be retained

4 none of the choices are correct

In an independent samples design, the Dog's mean was 54.0 and the Cat's mean was 53.9. Larger scores are better. Atvalue of 2.50 was calculated and anlevel of .05 adopted. Which conclusion is appropriate with a 2-tailed test?

If df= 10, Dogs are significantly better than Cats

If df= 9, Dogs are not significantly different from Cats

If df= 4, Cats are significantly better than Dogs

If df= 5, Dogs are significantly better than Cats