a Test 8, 9, 10 [Compatibility insert Design Layout References Mailings Review V
ID: 3486508 • Letter: A
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a Test 8, 9, 10 [Compatibility insert Design Layout References Mailings Review View AaBbCcDdEe 1 Normal 17. A researcher selects a sample of 32 participants who are assigned to participate in a study with two groups. What are the degrees of freedom for this test? A) 32 B) 30 C) 31 D) There is not enough information to answer this question. 18. A researcher conducts a study measuring differences in brain activity among rats placed on either a continuous or intermittent reward schedule. Assuming that the population variance in unknown, what t test is appropriate for this study? A) one-sample t test B) two-independent sample t test C) not enough information 19. Computing a two-independent sample t test is appropriate when A) B) C) D) different participants are assigned to each group the population variance is unknown participants are observed one time all of the above 26. 20. A researcher records differences in ratings of emotion among participants watching either a drama or a romance film. Assuming that the population variance is unknown, what type of t test is appropriate for this study? A) one-sample t test B) two-independent sample t test C) There is not enough information to answer this question. 27. Fo 21. A type of related samples design in which participants are observed more than once is called A) B) C) D) repeated measures design matched pairs design matched samples design both B and C 28. The 22. Each of the following is an advantage for using the related samples design, except A) B) C) D) it can be more practical it minimizes standard error it increases the power of a research design it increases the variability measured in a study 23. A researcher compares the difference in the amount of texting by students in class during the first week and last week of classes. The type of design described here is called a A) repeated measures design B) matched samples design C) both A and B ds English (US:Explanation / Answer
17) 31 as the degree of freedom can be definned as the minimum number of independant coordinates that can specify the position of the system completely.
18) Two independant sample t test different participants are assigned to each grooup,population variance is unknown and participants are observed on time.
19) Computing a two independant sampe t test is appropriate when participants are assigned to each group,population variance is unknown and participants are observed at one time.It compares the mean of two independant groups in order to determine the statistical evidence that the associated population means are significantly different.
20) Two independant sample t test as different participants are assigned to each group and population variance is unknown.
21) Repeated measure design as it uses the same subjects for study everytime .For example a class of students can be used to study different levels of stress during and after exams.
22) It can be more paractical as changes in the subject may be function of time,subjects feelings may vary over time.
23) repeated measure design as he uses the same subjects,using the same class of students, with varying research experimments.
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