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

.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

In a hypothetical study, a pharmaceutical company is interested in finding the dosage of a new medication that best treats panic attacks. Ninety people, who are diagnosed with panic attacks, were randomly assigned to three groups: (1) 20 milligrams of the new drug, (2) 30 milligrams of the new drug, and (3) 40 milligrams of the new drug.After 30 days on the medication, each participant records the number of panic attacks they have experienced in the previous seven days.What hypothesis testing technique should the researcher use to analyze the data? Paired t-test Two-sample t-test z-test for the population mean ANOVA

In which of the following situations would it be appropriate to use a paired t-test to analyze the data? Check all that apply. A marriage therapist believes that many couples have different perspectives regarding the state of their marriage prior to the start of couples therapy. In order to determine whether there is difference in marital satisfaction, prior to the start of couples therapy, each member of 30 married couples is individually given a marital satisfaction questionnaire. For each couple, the marital satisfaction scores of the wife and husband are compared to see if there is a difference in how they view the state of their marriage. A psychologist was interested in determining whether fraternal twins differ in terms the degree to which they are extroverts. A sample of 50 fraternal twins was given the Eysenck personality questionnaire to assess their levels of extraversion. Each twin’s extraversion score was compared to his/her fraternal twin. A psychiatrist believes that a new medication (New Drug) is more effective at reducing the symptoms of depression than a placebo, sugar pill (Placebo). Sixty people with depression were randomly assigned to one of two groups, (1) New Drug or (2) Placebo, and were given the assigned drug or sugar pill for 30 days. Each of the 60 participants then completed the Beck Depression Inventory and the mean depression score for the New Drug group is compared to the mean depression score for the Placebo group. A researcher is interested in determining the effects of sleep deprivation on the accuracy with which mazes are completed. Thirty people are given a test of mazes on Day 1 at 9 am and again on Day 2 at 9 pm after being kept awake for 36 hours. The researcher then compares the number of errors made on Day 1 to Day 2.

Which of the following is the most appropriate statistical test to use to determine if there is a relationship between smoking status (never smoked, former smoker, current smoker) and whether a person has ever had cancer (yes or no)? Two-sample t-test Chi-squared test for independence Matched pairs t-test ANOVA Inference for regression

A t test for testing the difference between two population means from two independent samples is the same as the t test to test the difference of two population means in a matched pairs experiment.Group of answer choicesTrueFalse