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True or False
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1
If the null hypothesis is correct, then the research hypothesis is accepted as correct.
A)True
B)False
2
The null hypothesis is rejected when there is a very low probability that the obtained results could be due to random error.
A)True
B)False
3
The probability required for significance is called the alpha level.
A)True
B)False
4
The t-test is most commonly used to examine whether two groups are significantly different from each other.
A)True
B)False
5
Error variance is the deviation of the group means from the grand mean.
A)True
B)False
6
A .05 significance level indicates that there is a 95 percent chance that the research findings are incorrect.
A)True
B)False
7
The probability of making a Type I error is determined by the choice of alpha level.
A)True
B)False
8
Nonsignificant results do not necessarily indicate that the null hypothesis is correct.
A)True
B)False
9
Chi-square tests are used in the case of ordinal scale data.
A)True
B)False
10
The Kruskal Wallace H test and the Mann-Whitney U test are both appropriate significance tests for interval scale data.
A)True
B)False
11
If you are sampling from the distribution specified by the null hypothesis and your obtained results are highly unlikely you should conclude the research hypothesis is correct.
A)True
B)False
12
Increased sample sizes lead to more accurate estimates of the true population values.
A)True
B)False
13
A researcher conducting an experiment with 4 levels of an independent variable should analyze his data with a t-test.
A)True
B)False
14
One-tailed tests are used when the researcher did not specify a predicted direction of difference in his treatment conditions.
A)True
B)False
15
The maximum value of Cohen's d is 1.00.
A)True
B)False





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