Question 2 . researcher is interested in how coping techniques affect test anxiety. He measures the test anxietyr of students in a classroom using an anxiety scale {pretest} before an exam. A week after the exam the students attend a workshop which teaches them techniques to cope with test anxiety. The researcher then measures the test anxiety of the students once again {posttest} before they take the second exam. If the psychologist wants to see it here is a change ofany kind [either an increase or decrease] in anxiety after attending his workshop. the appropriate description of "Population 2" [the population to which the population his sample represents is being compared] would be: (:1 People whose pretest scores were lower than the posttest spores (3 People whose posttest scores were lower than the pretest spores (:1 People whose difference scores will be zero Question 4 2 pts To estimate the population standard deviation, you use the scores from the sample and find the sum of the squared deviations around the sample mean. Next, you divide the sum of the squared deviations around the sample mean by ____. Finally, you take the square root. ON-1 O Mu O Sigma ONQuestion 5 A psychologist conducts a t test for dependent means in which it is predicted that there will he increase in condence from before to after a particular selfdevelopment program. The cutoff t needed is 1.333, the standard deviation of the distribution of means of change scores is 5.0, and the mean change score for the sample studied is an increase of 8.4. What is the correct decision? (:1 Reject null hypothesis Q Do not reject null hypothesis (:1 It cannot be determined without also knowing the population standard deviation (:1 It cannot be determined without also knowing the population mean