# Question

An experimenter investigated the effects of a sensitivity training course on a policeman’s effectiveness at resolving domestic disputes (using independent samples who had or had not completed the course). The dependent variable was the ability to resolve a domestic dispute. These success scores were obtained:

(a) Should a one-tailed or a two-tailed test be used?

(b) What are H0 and Ha?

(c) Subtracting course from no course, compute tobt and determine whether it is significant.

(d) Compute the confidence interval for the difference between the ^s.

(e) What conclusions can the experimenter draw from these results?

(f) Using our two approaches, compute the effect size and interpret it.

(a) Should a one-tailed or a two-tailed test be used?

(b) What are H0 and Ha?

(c) Subtracting course from no course, compute tobt and determine whether it is significant.

(d) Compute the confidence interval for the difference between the ^s.

(e) What conclusions can the experimenter draw from these results?

(f) Using our two approaches, compute the effect size and interpret it.

## Answer to relevant Questions

When reading a research article, you encounter the following statements. For each, identify the N, the design, the statistical procedure performed and the result, the relationship, and if a Type I or Type II error is ...(a) What does it mean to “account for variance”? (b) How do we predict scores in an experiment? (c) Which variable in an experiment is potentially the good predictor and important? (d) When does that occur? (a) Why should Fobt equal 1 if the data represent the H0 situation? (b) Why is Fobt greater than 1 when the data represent the Ha situation? (c) What does a significant Fobt indicate about differences between the levels of a ...(a) What is the difference between n and N? (b) What does k stand for? (a) What are error variance and treatment variance? (b) What are the two types of mean squares, and what does each estimate?Post your question

0