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BESC 3010 Ch. 09- Questions & Answers
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BESC 3010 Ch. 09- Questions & Answers
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BESC 3010 Ch. 09- Questions & AnswersIf a research conducts an inferential test (such as a t-test) and rejects the null hypothesis, then
what is the probability of a Type II error?
.05
0.00
1.00
1.00 - p Correct Ans-0.00
If n = ∞, then what is the critical value of t for alpha = .05?
Cannot be determined without additional information
±3.30
±1.96
0.00 Correct Ans-±1.96
If a researcher conducts a t-test with an alpha of .01 and gets a p-value of .25, then the
researcher should...
reject the null hypothesis.
transform the data.
retain (i.e, fail to reject) the null hypothesis.
switch to the standard alpha of .05. Correct Ans-retain (i.e, fail to reject) the null hypothesis.
If you want to compare the means of two different groups to each other then you should use...
, a one-sample z-test.
a one-sample t-test.
the ratio of standard errors.
a two-sample t-test. Correct Ans-a two-sample t-test.
What is the formula for the degrees of freedom (df) for a two-sample t-test?
n - k -1
n-1
n
n-2 Correct Ans-n - 2
As the means of two groups become more similar, Cohen's d will...
become positively skewed.
approach 0.
become impossible to calculate.
approach infinity. Correct Ans-approach 0.
If you conduct a one-tailed (i.e., directional) two-sample t-test with a critical value of +2.20 and
gets an observed value of t = -3.53, then what should you do?
Reject the null hypothesis
Retain the null hypothesis
Use a two-tailed (i.e., nondirectional) test instead
Cannot be determined without additional information Correct Ans-Retain the null
hypothesis
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