.Question 14Researchers were interested in differences in cooperation during and after a stressor. They tested a group 1 day after their final exams ended. What hypothesis test should be used to compare the mean difference in cooperation scores?1 pointOne-sample t-test Paired-samples t-testOne-sample z-testIndependent-samples t-test

A smoking cessation clinic is conducting a study of the effectiveness of its treatments. Those attending the clinic are randomly assigned to one of two groups. One group receives nicotine patches and the other group is prescribed the medication, Zyban. After 8 weeks, the participants are asked whether they now feel able to give up smoking. Their responses are scored 1= strongly disagree, 2= disagree, 3=neither agree nor disagree, 4=agree, 5=strongly agree. Which statistical test can be used to test for a difference between the scores for the two groups?Question 9Answera.Paired T-Testb.One-Way Independent-Sample ANOVAc.Mann-Whitney U Testd.Chi-Square Test

A study investigates whether there is a significant difference in mean exam scores between students who receive tutoring and those who do not. Which type of t-test would be most suitable?*One-sample t-testDependent samples t-testIndependent samples t-testPaired samples t-testNone of the above

When conducting a one-sample t-test, what is the null hypothesis comparing?*1 pointa. Two independent samplesb. Two paired samplesc. One sample to a known population parameterd. The means of three or more groups

Which test is used for testing the significance of mean differences?

The paired t-test is essentially ...Question 2Answera.A two-sample t-test with the null hypothesis that the two means are differentb.A two-sample t-test with the null hypothesis that the two means are equalc.A one-sample t-test with the null hypothesis that the difference scores have a mean equal to the higher scored.A one-sample t-test with the null hypothesis that the difference scores have a mean of 0