QUESTION 20 A researcher is interested in studying the difference in the average

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QUESTION 20 A researcher is interested in studying the difference in the average level of anxiety among college students who are in their first semester of college are in their final semester of college. The researcher has a sample of 62 students in their first semester and 60 students in their final semester and conducts a two-sample t test (two-tailed, alpha-05). The researcher finds the following: compared to students wh 1. Students in their first semester of college (group 1) have an average anxiety score of 1.8 2. Students in their final semester of college (group 2) have an average anxiety score of 2.8. 3. The standard error of the mean difference between students in their first semester and finall semester (i.e, the se) is.20. Using this information, identify the correct answer for each item below A. 122 1.98 1.67 1.0 Degrees of freedom greater anxiety than students in their first semester F. Fail to reject the null hypothesis there is no difference between students in their first and final semester in terms of anxiety 120 H. 5.00

Explanation / Answer

obtained test statistic t =(X-mean)/std error =(1.8-2.8)/0.2 =-5 ; option H

crtiical t value t =-1.98 option B

deree of freedom =n1+n2-2=62+60-2=120 option G

as test statistic is in critical region ; option E

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