A researcher obtains z = 3.79 for a one-sample z test. If the researcher decided to retain the null hypothesis, then:
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Correct Answer:
Both A and B
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The greater the power, the more likely we are to correctly reject the null hypothesis, if it is incorrect.
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Correct Answer:
True
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An effect size of d = 0.18 is a large effect in the population.
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Correct Answer:
False
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A Type III error is possible for hypothesis tests where the rejection region is located in both tails.
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Correct Answer:
False
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The alpha level is completely different from the p value.
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Correct Answer:
True
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One step to hypothesis testing is to compute the test statisti
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Correct Answer:
True
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One step to hypothesis testing is to compute the test statisti
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Correct Answer:
True
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In one study, it was reported that scores were lower than the population mean, and z = −1.75, p = .05 (d = .14). If this was a test at a .05 level of significance, then what value must be incorrectly reported?
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Correct Answer:
The p value
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In one study, it was reported that scores were lower than the population mean, and z = −1.75, p = .05 (d = .14). If this was a test at a .05 level of significance, then what value must be incorrectly reported?
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Correct Answer:
The p value
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The power in hypothesis testing is:
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Correct Answer:
The probability of rejecting a false null hypothesis.
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Given the following values: u = 5.0, M = 6.6, n = 25, and ϭ = 5, conduct a one-sample z test at a .05 level of significance. For a one-tailed test, upper-tail critical, what is the decision?
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Correct Answer:
To retain the null hypothesis
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Which of these statements is false?
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Correct Answer:
A researcher can directly control the probability of a Type II error.
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Which of these statements is false?
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Correct Answer:
A researcher can directly control the probability of a Type II error.
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A researcher studying the development of executive functions in children conducts an experiment and computes a test statisti He finds that the p value for this test is .025. This result means that:
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Correct Answer:
There is a 2.5% likelihood of obtaining the test statistic value, if the null is true.
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If the value of the test statistic is in the rejection region, then:
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Correct Answer:
P < .05.
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The mean for a vocabulary test is 100; a researcher selects a sample to administer this test. In this example, the null hypothesis is:
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Correct Answer:
U = 100.
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Only one of the following is a step to hypothesis testing.
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Correct Answer:
Set the criteria for a decision
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A method for testing a claim or hypothesis about a parameter in a population, using data measured in a sample, is called:
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Correct Answer:
Both A and B
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A method for testing a claim or hypothesis about a parameter in a population, using data measured in a sample, is called:
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Correct Answer:
Both A and B
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Z Statistic is an inferential statistic used to determine the number of _____ in a standard normal distribution.
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Correct Answer:
Standard Deviation
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Type III Error is a type of error possible with _____ in which a decision would have been to reject the null hypothesis.
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Correct Answer:
One-Tailed Hypothesis
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The probability of retaining a null hypothesis that is actually false is known as_____
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Correct Answer:
Type II Error
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The probability of retaining a null hypothesis that is actually false is known as_____
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Correct Answer:
Type II Error
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Type I Error is the probability of retaining a null hypothesis that is actually false.
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Correct Answer:
False
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Type I Error is the probability of retaining a null hypothesis that is actually false.
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Correct Answer:
False
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Type I Error is the probability of retaining a null hypothesis that is actually false.
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Correct Answer:
False
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Type I Error is the probability of retaining a null hypothesis that is actually false.
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Correct Answer:
False
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_____ are the hypothesis tests in which the alternative hypothesis is stated as not equal to (≠) a value stated in the null hypothesis.
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Correct Answer:
Both b and c
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_____ are the hypothesis tests in which the alternative hypothesis is stated as not equal to (≠) a value stated in the null hypothesis.
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Correct Answer:
Both b and c
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The value of the test statistic is used to make a decision regarding a _____ hypothesis.
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Correct Answer:
Null
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When the null hypothesis is retained, we reach Statistical Significance.
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Correct Answer:
False
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A method for testing a claim or hypothesis about a parameter in a population, using data measured in a sample is known as_____
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Correct Answer:
Significance Testing
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Significance Level refers to criterion of judgment upon which a decision is made regarding the value stated in a _____ hypothesis.
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Correct Answer:
Null
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A decision made concerning a value stated in the null hypothesis is known as _____
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Correct Answer:
Significance
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When the value of a test statistic is in the rejection region, we decide to reject the null hypothesis; otherwise, we retain the null hypothesis
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Correct Answer:
True
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Power is the probability of rejecting a _____ hypothesis.
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Correct Answer:
False null
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P Value is the probability of a obtaining a sample outcome, given that the value stated in the null hypothesis is _____
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Correct Answer:
True
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One-Tailed Tests are the hypothesis tests where the alternative hypothesis is stated as _____ a value stated in the null hypothesis.
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Correct Answer:
Both a and b
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One-Sample Z Test is a statistical procedure used to test hypotheses concerning the mean in a_____ with a known variance.
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Correct Answer:
Single sample
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Obtained Value is compared to the _____of a hypothesis test to make a decision.
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Correct Answer:
Critical value
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Null Hypothesis is a statement about a population parameter, such as the population mean, that is assumed to be false.
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Correct Answer:
False
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Nondirectional Tests are the hypothesis tests in which the alternative hypothesis is stated as _____ a value stated in the null hypothesis.
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Correct Answer:
≠
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Level of Significance refers to criterion of judgment upon which a decision is made regarding the value stated in a null hypothesis.
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Correct Answer:
True
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A method for testing a claim or hypothesis about a parameter in a population, using data measured in a sample is known as_____
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Correct Answer:
Both a and b
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Hypothesis is a statement or proposed explanation for_____ that can be tested using the research method.
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Correct Answer:
All of these
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The purpose of Effect Size is _____
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Correct Answer:
All of these
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In hypothesis testing, an effect is not significant when we retain the null hypothesis.
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Correct Answer:
True
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Directional Tests are the hypothesis tests where the alternative hypothesis is stated as _____ a value stated in the null hypothesis.
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Correct Answer:
Both a and b
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Critical Value is a cutoff value that defines the boundaries beyond which _____ of sample means can be obtained if the null hypothesis is true.
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Correct Answer:
5% or less
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Cohen’s Effect Size Conventions are the standard rules for identifying _____ effects based on typical findings in behavioral research.
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Correct Answer:
All of these
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Beta Error is the probability of retaining a null hypothesis that is actually true.
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Correct Answer:
False
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Alternative Hypothesis is a statement that directly contradicts a null hypothesis by stating that the actual value of a population parameter, such as the mean, is_____ the value stated in the null hypothesis.
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Correct Answer:
All of these
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Alpha Level is the largest probability of committing a _____ error that researchers will allow and still decide to reject the null hypothesis.
Answer
Correct Answer:
Type I
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