Page 60 - Quantitative Data Analysis

Quantitative Data Analysis
Simply Explained Using SPSS

Unit Exercises

1. Which of the following statements describes the role of the
null hypothesis in research?
a. it is a statement which answers the research question
after the data is analyzed
b. it is a statement of conclusion after the data is analyzed
c. it is a statement of a real relationship between variables
that is to be tested by data analysis
d. it is a statement of no relationship between variables
that is to be tested by data analysis

2. A two-tailed test differs from a one-tailed test in that in a
one-tailed test the researcher is interested in changes that
take place in which of the following ways:
a. only in a positive direction
b. only in a negative direction
c. in both positive and negative directions
d. either in a positive or negative direction, but not both

3. The phrase “level of significance” refers to which of the
following situations?
a. The probability of an event being due to chance alone,
which is calculated after the data from an experiment
are analyzed
b. The probability of a Type I error that an investigator is
willing to accept
c. The actual probability of a Type II error
d. The probability of reporting there is no relationship
when there really is one

The Theory and Applications of Statistical Inferences 44