Question 11 1 pts Suppose you want to conduct an independent samples t-test. What specific information must you already know about a comparison population? O o (sigma) O both u (mu) and o (sigma) O H (mu) O You do not need to know specific population information to do an independent samples t-test.Question 16 1 A researcher wants to know if older siblings have greater motivation to succeed than their younger siblings. The researcher asks a group of 50 sibling pairs how motivated they are to succeed on a scale of 1-7. As discussed in lecture, what would be the best rst step in calculating an inferential statistic? O Subtract the motivation of younger sibling from the other (older sibling). 0 Calculate the mean for younger siblings. 0 Calculate the standard deviation for older siblings. 0 Calculate the mean for older siblings. Question 17 1 pt! A researcher is interested to see if depression is different in those who use Facebook compared to those who do not. She knows the average depression score on the Beck Depression inventory for the general population is [.1 = 17, o = 6. She collects a sample of 50 Facebook users and determines their average depression score is 21. Which type of inferential test should she conduct? 0 One sample z-test O Paired (related, dependent] Samples t-test O One-sample t-test 0 Independent Samples t-test Question 18 1 pts A researcher is interested to see if depression is different in those who use Facebook compared to those who do not. She knows the average depression score on the Beck Depression inventory for the general population is p = 17, o = 6. She collects a sample of 50 Facebook users and determines their average depression score is 21. What are the degrees of freedom for this test? 093 049 Q There are no degrees of freedom for this test, because it is a z-test. O48 Question 19 1 pts A researcher is interested to see if depression is different in those who use Facebook compared to those who do not. She knows the average depression score on the Beck Depression inventory for the general population is p = 17, o = 6 She collects a sample of 50 Facebook users and determines their average depression score is 21. If she is conducting a two-tailed tested, :1 (alpha) = .05, with critical values of +f 1.96, and she calculates an observed test-statistic of 3.53, she should 0 tail to reject the null hypothesis. 0 prove the null hypothesis. 0 reject the null hypothesis. 0 There is not enough information to answer this question. \"nu-annul- h\" .n. Inu- A researcher is interested to see if depression is different in those who use Facebook compared to those who do not. She knows the average depression score on the Beck Depression inventory for the general population is u = 17. o = 6 She collects a sample of 50 Facebook users and determines their average depression score is 21 . If she is conducting a twotailed tested, (1 {alpha} = .05. with critical values of +/ 1.96, and she calculates an observed teststatistic of 3.53, she can conclude ______ . 0 Depression levels are higher among facebook users. C) There is not enough information to answer this question. 0 Depression levels are the same as among facebook users. compared to the general population. 0 Depression levels are lower among facebook users. Question 21 1 pts I am concerned about having my child play in the neighborhood park near my house because of the possible presence of highly aggressive children. l have drawn one random sample of 100 children from the neighborhood (N = 100) and I measure their aggressive play. I want to see if they are different from the general population in terms of their aggressive play. My sample had a mean aggressive play score of 11. with a standard deviation of 3. I know that the average aggressive play score in the general population is 10. Which type of inferential test should I conduct? 0 Independent Samples l-test C) One sample z-test O One-5am ple Hest O Paired [related, dependent) Samples t-test I am concerned about having my child play in the neighborhood park near my house because of the possible presence of highly aggressive children. l have drawn one random sample of 100 children from the neighborhood [N = 100) and I measure their aggressive play. I want to see if they are different from the general population in terms of their aggressive play. My sample had a mean aggressive play score of 11, with a standard deviation of 3. I know that the average aggressive play score in the general population is 10. Based on these data. I calculate an observed test-statistic of 3.33. and look up critical values of +f 1.98. I can conclude that ______________ _. O I don't have enough information to answer this question. 0 the kids in my neighborhood are less aggressive than is typical. 0 the kids in my neighborhood are more aggressive than 'Is typical. 0 the kids in my neighborhood have typical aggression levels. Question 23 1 pts I am concerned about having my child play in the neighborhood park near my house because of the possible presence of highly aggressive children. l have drawn one random sample of 100 children from the neighborhood [N = 100) and I measure their aggressive play. I want to see if they are different from the general population in terms of their aggressive play. My sample had a mean aggressive play score of 11, with a standard deviation of 3. I know that the average aggressive play score in the general population is 10. Based on these data. I calculate an observed test-statistic of 3.33 and look up critical values of +{- 1.98, I should ___________________ . O reject the null hypothesis. 0 prove the null hypothesis. 0 fail to reject the null hypothesis. 0 I don't have enough information to answer this question. A researcher gathers a random sample of people to see if a new test-taking strategy will change scores on class exams. She chooses an SAT mathematics exam and gives it to a set of test-takers. During the next week. the researcher hosts test-taking strategy seminars that all of the test takers attend. The same people then take a highly similar SAT exam. The average difference between the pre- and post-tests was a 6-point increase from Time 1 to Time 2. The researcher used an (1 {alpha} = .05. The inferential test-statistic {the calculated result} was: H999) = 13.49. p