Exam 8: Testing Means: One-Sample T Test With Confidence Intervals

A researcher reports the following result for a one-sample z test at a .05 level of significance: z  1.88,p  .06 (d  .25).Is this result significant?

What are the two decisions that researchers can make in hypothesis testing?

The probability of correctly rejecting a false null hypothesis is called the power of the decision-making process.

The power of the decision-making process is

A researcher reports that scores were higher than the mean in the population,z = 1.60,p = .05 (d =.14).If this was a test at a .05 level of significance,then what value must be incorrectly reported?

A method for testing a claim or hypothesis about a parameter in a population,using data measured in a sample,is called

A researcher computes a test statistic and finds that the p value for this test is .03.What does this result mean?

A researcher obtains z = 1.45 for a one-sample z test.What is the decision for this test at a .05 level of significance?

Based on the effect size conventions,d = 0.60 is a

Based on the effect size conventions,d = 0.18 is a

Given the following values: = 6.0,M = 7.6,n = 36, = 6,conduct a one-sample z test at a .05 level of significance.For a one-tailed test,upper-tail critical,what is the decision?

The first step to hypothesis testing requires that a researcher

The null hypothesis and alternative hypotheses are statements about parameters in the population.

The critical values are reported with the test statistic of a one-sample z test using APA format.

A measure of the size of an effect in a population is called

A researcher reports that the standard deviation in Population A is = 2.3 and the standard deviation in Population B is = 4.3.Which population is associated with the highest power to detect an effect?

A researcher computes a one-sample z test in two studies.Both studies used the same alpha level,placed the rejection region in both tails,and measured the same sample mean.The researcher selects a sample of 30 participants in Study 1 and decides to retain the null hypothesis.She selects a sample of 60 participants in Study 2 and decides to reject the null hypothesis.Which of the following is the best explanation for why the decision was different in Study 1 and Study 2?

A researcher conducts a study,but has low power to detect an effect.Which of the following is one way in which the research can increase power?

A researcher conducts two studies.Each study was a one-sample z test.Both studies placed the rejection region in both tails and measured the same sample mean.The alpha level in Study 1 was larger than the alpha level used in Study 2.Which study is associated with greater power to detect an effect?

The one-sample z test is a hypothesis test used to test hypotheses