A study was conducted to investigate the effectiveness of hpynotism in reducing pain. Results for randomly selected subjects are shown in the table. Test the claim that pain is lower after hypnotism at the 5% significance level. Subject A B C D E F G H Before 6.6 6.5 9.0 10.3 11.3 8.1 6.2 11.6 After 6.8 2.4 7.4 8.5 8.1 6.1 3.4 2.0

A study was conducted to investigate the effectiveness of hpynotism in reducing pain. Results for randomly selected subjects are shown in the table. Test the claim that pain is lower after hypnotism at the 5% significance level. Subject A B C D E F G H Before 6.6 6.5 9.0 10.3 11.3 8.1 6.2 11.6 After 6.8 2.4 7.4 8.5 8.1 6.1 3.4 2.0

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Immediate feedback to incorrect exam answers.Researchers from the Educational Testing Service (ETS) found that providing immediate feedback to students answering open-ended questions can dramatically improve students’ future performance on exams (Educational and Psychological Measurement, Feb. 2010). The ETS researchers used questions from the Graduate Record Examination (GRE) in the experiment. After obtaining feedback, students could revise their answers. Consider one of these questions. Initially, 50% of the students answered the question correctly. After providing immediate feedback to students who answered incorrectly, 70% answered correctly. Consider a bank of 100 open-ended questions similar to those on the GRE.a. In a random sample of 20 students, what is the probability that more than half initially answer the question correctly? b. Refer to part a. After providing immediate feedback, what is the probability that more than half of the students answer the question…
A graduate student is interested in how viewing different types of scenes affects working memory. For his study, he selects a random sample of 36 adults. The subjects complete a series of working memory tests before and after walking in an urban setting. Before the walk, the mean score on the test of working memory was 9.1. After the walk, the mean score was 1.4 higher. The graduate student has no presupposed assumptions about how viewing different types of scenes affects working memory, so he formulates the null and alternative hypotheses as: H00 : μDD = 0 H11 : μDD ≠ 0 Assume that the data satisfy all of the required assumptions for a repeated-measures t test. The graduate student calculates the following statistics for his hypothesis test: Mean difference (MDD) 1.4 Estimated population standard deviation of the differences (s) 1.6 Estimated standard error of the mean differences (sMDMD) 0.2667 Degrees of freedom (df) 35 The t statistic 5.25 The critical values of t…
Need C and D
A researcher would like to determine if relaxation training will affect the number of headaches for chronic headache sufferers. For a week prior to training, each participant records the number of headaches suffered. Participants then receive relaxation training and for the week following training the number of headaches is again measured. The data are as follows: Participant Before After 3 3. 4 Do the results indicate a significant difference? Use a one-tailed test with a = .05 4. 2. 4. 1. 2. 4) 5.
Find the test statistic and p value
How would you find (a.) and (b.)?? As well as finding the test statistic and p-value?
Enter the data below into SPSS. It is from a sensory deprivation study looking at hearing threshold before or after one hour in a sensory deprivation chamber. Seven subjects participated in both before and after conditions in the actual study. Test the hypothesis that hearing should be more sensitive (thus lower numbers) after sensory deprivation compared with before. BEFORE: 11, 34, 18, 33, 35, 22, 35 AFTER: 13, 31, 18, 29, 32, 20, 28 Proper type of t-test to use: Is the hypothesis one-tailed or two-tailed? What is the null hypothesis? Copy and paste your output here What is your conclusion based on this hypothesis test?
Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires caused by humans in the west? 367 of the 526 randomly selected wildfires looked at in the south were caused by humans while 390 of the 594 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: Select an answer > Select an answer > Select an answer O (please enter a decimal) H j: Select an answer Select an answer > Select an answer O (Please enter a decimal) c. The test statistic (please show = your answer to 3 decimal places.) d. The p-value (Please show your answer to %3D 4 decimal places.)
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Which test statistic should be used to analyze the data?