A researcher wants a 90 percent chance of rejecting the null hypothesis at the one-tailed .05 level with an effect size of .15 . The sample size needed is about
a. 140.
b. 160.
c. 180.
d. 200.
e. 380
E
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Most diagnostic tests in mathematics do not test a sufficiently detailed __________ of facts and concepts
Fill in the blank(s) with correct word
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Doubling the sample size will increase the probability of making a Type II error.
Answer the following statement true (T) or false (F)
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During the 1900s, most U.S. states had established at least one residential institution for individuals with disabilities
Indicate whether the statement is true or false
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A predictor variable is another name for:
a. A dependent variable. b. A confounding variable. c. A discrete variable. d. An independent variable.
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