Test 4 Flashcards
Tabulation refers to the orderly arrangement of data in a summary format.
true
Choosing the right statistic boils down to what type and how many variables are involved in a particular research question or hypothesis.
true
In a regression equation, the beta coefficients indicate the effect on the dependent variable of a 1-unit increase in any of the independent variables.
true
The purpose of a table in a research report is to summarize and communicate the meaning of the data to the reader.
true
Multivariate statistical analysis permits the researcher to consider more than one dependent variable at the same time.
true
The main reason a large sample size is desirable is that sample size is related to random sampling error.
true
In multiple regression, the dependent variable must be continuous and interval-scaled.
true
Cross-tabulation allows the inspection and comparison of differences among groups based on nominal or ordinal categories.
True
The t-test is appropriate for small sample sizes with unknown standard deviations.
true
Coding involves assigning some representative value to units of data having similar meaning.
true
When the difference between two groups is measured, bivariate statistics are used.
true
One hundred percent of the scores in a normal distribution fall within plus or minus two standard deviations of the mean.
false
A Type II error occurs when the researcher rejects the null hypothesis when, in fact, it is true.
false
In a regression equation, the slope of the line, , is the change in X that is due to a corresponding change of one unit of Y.
false
Multiple regression analysis includes a single independent variable but several dependent variables.
false
Nonresponse bias causes problems because it means that the sampling units that participated are different from those that did not participate.
truw
The mode is the measure of central tendency that identifies the value that occurs most often.
true
The row and column totals in a contingency table are called subtotals because they are less than the total.
false
If a researcher is interested in whether adult males purchase a product more frequently than adult females, univariate statistics would be used in the analysis of data.
false
ANOVA and Linear Regression are among the most common forms of the general linear model (GLM).
true
What are some of the most common statistical software packages?
SPSS, SAS, and EXCEL