# Defining the hypothesis tests

1)

a) Which variable in an experiment determines whether to use parametric or nonparametric procedures?

b) In terms of the dependent variable, what are the two categories into which all nonparametric procedures can be grouped?

2)

a) Why, if possible, should we design a study that meets the assumptions of a parametric procedure?

b) Why shouldn't you use parametric procedures for data that clearly violate their assumptions?

3) A survey finds that, given a choice, 34 females prefer males much taller than themselves, and 55 females prefer males only slightly taller than themselves.

a) What procedure should we perform?

b) What are the Ho and Ha?

c) With α= .05, what do you conclude about the preference of females in the population?

d) Describe how you would graph these results

4) The following data reflect the frequency with which people voted in the last election are were satisfied with the officials elected:

Yes No

Yes 48 35

No 33 52

What procedure should we perform?

What are the Ho and Ha?

What is f_e in each cell?

Compute X_obt^2

With α= .05, what do you conclude about these variables?

How consistent is this relationship?

#### Solution Preview

Hi there,

Please see Attached for the solutions.

1)

a) Which variable in an experiment determines whether to use parametric or nonparametric procedures?

The dependent variable in an experiment could determine whether to use parametric or nonparametric procedures.

b) In terms of the dependent variable, what are the two categories into which all nonparametric procedures can be grouped?

Nominal or ordinal data are the two categories.

2)

a) Why, if possible, should we design a study that meets the assumptions of a parametric procedure?

Because parametric procedure is a more powerful procedure.

b) Why shouldn't you use parametric procedures for data that clearly violate their assumptions?

Because accuracy of parametric procedures is heavily dependent on the assumptions of normal distribution.

3) A survey finds that, given a choice, 34 ...

#### Solution Summary

Hypothesis tests are defined for dependent variables