Which of the following tests analyzes the difference between the means of two independent samples?
correlated t test
t test for independent groups
test of variance
If its assumptions are met, the analysis of variance technique is appropriate when ____.
two or more factors are varied
several levels of a single independent variable are compared
three or more groups are involved
all of the other three options
sB2 is a measure of ____.
s 2 alone
s 2 + the effects of the independent variable
the variability between the means
s 2 + the effects of the independent variable and the variability between the means
If X1 = 46, X2 = 50, X3 = 92 and n1 = n2 = n3, what is the value of Xg?
cannot be determined from information given
The sampling distribution of chi-square is ____.
varies with df
is a theoretical distribution
all of the other three options
A contingency table ____.
is a two-way table
involves two variables
involves two mutually exclusive variables
is a two-way table and involves two variables
If N = 18 and a = 0.052 tailed, the value of Tcrit is ____.
Prior to a recent gubernatorial election, a survey was conducted to determine whether there was a relationship between sexual gender and preference for the Democratic or Republican candidate. The following data were recorded.
(Republican first column) (democrat second column)
Female: 82 | 118
Male: 68 | 132
Refer to Exhibit 17-1. Using a = 0.05, what is your conclusion?
accept H0; there is no relationship between sex and candidate preference
reject H0; there is a significant relationship between sex and candidate preference
retain H0; the study does not show a significant relationship between sex and candidate preference
retain H0; this study shows a significant relationship between sex and candidate preference
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