Paired T-Test: Before, After
Paired T for Before - After
N Mean StDev SE Mean
Before 5 2.800 0.255 0.114
After 5 3.320 0.295 0.132
Difference 5 -0.520 0.228 0.102
A academic tutor wants to assess whether her remedial tutoring has been effective for her five...
A academic tutor wants to assess whether her remedial tutoring has been effective for her five students. She decides to conduct a related samples t-test and records the following grades for students prior to and after receiving her tutoring. Tutoring Before After 2.4 3.1 2.5 2.9 3.0 3.5 2.9 3.1 2.7 3.5 (a) Test whether or not her tutoring is effective at a 0.05 level of significance. State the value of the test statistic. (Round your answer to three decimal...
A academic helper wants to assess whether her remedial tutoring has been effective for her five students. She decides to conduct a related samples t-test and records the following grades for students prior to and after receiving her tutoring. Tutoring Before After 2.4 3.0 2.5 2.8 3.0 3.6 2.9 3.2 2.7 3.5 (a) Test whether or not her tutoring is effective at a 0.05 level of significance. State the value of the test statistic. (Round your answer to three decimal...
An academic person wants to assess whether her remedial tutoring has been effective for her five students. She decides to conduct related samples t-test and records the following grades for students prior to and after receiving her help. Tutoring Before After 2.5 3.1 2.6 3.0 3.1 3.7 3.0 3.2 2.8 3.6 (a) Test whether or not her tutoring is effective at a 0.05 level of significance. State the value of the test statistic. (Round your answer to three decimal places.)...
A statistics professor wants to assess whether her remedial tutoring has been effective for her five students. She decides to conduct a related samples t-test and records the following grades for students prior to and after receiving her tutoring. Before After 2.6 3.3 2.7 3.0 3.2 3.7 3.1 3.4 2.9 3.7 (a) Test whether or not her tutoring is effective at a 0.05 level of significance. State the value of the test statistic. (Round...
A academic instructor wants to assess whether her remedial tutoring has been effective for her five students. She decides to conduct a related samples t-test and records the following grades for students prior to and after receiving her tutoring. Tutoring Before After 2.6 3.2 2.7 3.0 3.2 3.7 3.1 3.3 2.9 3.8 (a) Test whether or not her tutoring is effective at a 0.05 level of significance. State the value of the test statistic. (Round your answer to three decimal...
A academic tutor wants to assess whether her remedial tutoring has been effective for her five students. She decides to conduct a related samples t-test and records the following grades for students prior to and after receiving her tutoring.TutoringBeforeAfter2.53.12.63.03.13.63.03.22.83.6(a) Test whether or not her tutoring is effective at a 0.05 level of significance. State the value of the test statistic. (Round your answer to three decimal places.)t = State the decision to retain or reject the null hypothesis.Retain the null hypothesis.Reject the null...
*show work by hand* 5) Wilcoxon Signed-Ranks T Test A statistics tutor wants to assess whether his remedial tutoring sessions have been useful for his 8 students. He records their class grades (percentages) before and after the sessions. Conduct the Wilcoxon Signed-Ranks T Test to determine whether the sessions significantly improved their grades (8 points). Difference (After - Before) Difference Student After Before Tutoring 77 Tutoring 88 Rank D.O. 72 J.I. 91 81 82 D.S. 76 79 E.C. 67 80...
A schoolteacher is concerned that her students watch more TV than the average American child. She reads that according to the American Academy of Pediatrics (AAP), the average American child watches 4 hours of TV per day (μ = 4.0 hours). She records the number of hours of TV each of her six students watch per day. The times (in hours) are 3.8, 4.6, 2.9, 5.5, 4.4, and 2.8. (a) Test the hypothesis that her students watch more TV than...
A professor tests whether the loudness of noise during an exam (low, medium, and high) is independent of exam grades (pass, fail). The following table shows the observed frequencies for this test. Noise Level Low Medium High Exam Pass 20 17 9 46 Fail 9 7 12 28 29 24 21 N = 74 (a) Conduct a chi-square test for independence at a 0.05 level of significance. (Round your answer to two decimal places.) = Decide whether to retain or...
A cheerleading squad received a mean rating (out of 100 possible points) of 75 ± 9 (μ ± σ) in competitions over the previous three seasons. The same cheerleading squad performed in 16 local competitions this season with a mean rating equal to 77 in competitions. Suppose we conduct a one-independent sample z-test to determine whether mean ratings increased this season (compared to the previous three seasons) at a 0.05 level of significance. (a) State the value of the test...