mean‚ median‚ and mode or modes for the following samples: (i) 7‚ 4‚ 6‚ 2‚ 6‚ 7‚ 3‚ 5 (ii) 0‚ -3‚ 5‚ -2‚ -6‚ 4‚ 7‚ 9‚ 4‚ -3‚ 0‚ 2 b. The number of days for which each of 15 office workers of a firm was absent during a one-month period is as sfollows: 0‚ 1‚ 1‚ 3‚ 0‚ 0‚ 2‚ 5‚ 0‚ 1‚ 1‚ 2‚ 0‚ 1‚ 1 Calculate the interquartile range‚ variance and standard deviation of the number of days absent. 2. The number of hours a student spent studying for a statistics course over
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Week 4 Practice Problems 11. List the five steps of hypothesis testing‚ and explain the procedure and logic of each Step 1: During this step of hypothesis testing‚ the query is stated again as a research theory and a null theory regarding the populations. The null and research hypothesizes are the opposites of each other. This step is necessary because it explains the theory and recognizes the populations‚ which will be worked throughout the study. Step 2: During this second step‚ the characteristics
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1. C Correct 2. A Correct 3. A Incorrect PAGE 22 4. A Correct 5. B Correct 6. C Incorrect PAGE 9 7. A Incorrect PAGE 35 8. A Correct 9. C Correct 10. C Incorrect PAGE 23 11. A Correct 12. B Incorrect PAGE 58 13. A Correct 14. B Correct 15. A Incorrect PAGE 44 16. C Correct 17. B Incorrect PAGE 53 18. A Correct 19. D Incorrect PAGE 45 20. D Incorrect PAGE 66
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Research‚ Statistics‚ and Psychology PSY/315 January 13‚ 2014 Research‚ Statistics‚ and Psychology Humans and animals may have a vast number of similarities‚ but the one thing that sets humans apart is the unique ability to question. When psychologists look to find the answers to questions‚ they often turn to statistics. Gathering research to devise rational explanation is important to psychology; it is not only important‚ but the manner in which it is done is scientific. Psychologists use
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t 1. (Points: 1) | | Congress is a __________ legislature with __________ members.I GOT 10/13 RIGHT THAT I ANSWERED!!!a. bicameral; 100b. unicameral; 630c. bicameral; 535d. unicameral; 342 | | Save Answer | | 2. (Points: 1) | | Which type of representation takes place when representatives have the same racial‚ ethnic‚ religious‚ or educational backgrounds as their constituents?a. Trusteeb. Sociologicalc. Agencyd. Delegate | | Save Answer | | 3. (Points: 1) |
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who has never taken a course in statistics. Part A. Step 1. Ho=M=24(null) H1=M24(alternative) Step 2. X | | | 25 | 0 | 0 | 27 | 2 | 4 | 25 | 0 | 0 | 23 | -2 | 4 | 24 | -1 | 1 | 25 | 0 | 0 | 26 | 1 | 1 | 25 | 0 | 0 | x= 200 S2=10/7= 1.42857 S2M=S2/N=10÷7/8=0.17857 SM=Sm2= 0.422577 Step 3. (=.025‚ DF=7) =2.365 =.05 /2= .025 (two tailed test) So if the sample > 1.895 We reject H0 Step 4. Sample = 2.366
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For control 2‚ it is larger because the expected rate is larger than control 1. This will require the sample to be more precise. For control 3‚ it is smaller because the tolerable rate is larger. The sample does not have to be
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-0.8 How many levels of variation should an IV have At least 2 Consider the following research title: “cooperation among nursery school children: the role of teachers age”. In this study the IV is Teachers age Which of the following statements about reliability and validity is
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Hypothesis Testing PSY/ 315 University of Phoenix May 2015 What is Hypothesis Testing? O “[…method for determining the probability of an observed event that occurs only by chance” (Allua & Thompson‚ 2009). O Two hypothesis types: null and research O Does not prove but suggests that the hypothesis is plausible O Five steps of the method Null Hypothesis O No difference between groups compared O The difference is null O In a control and treatment group it states that the treatment had no effect
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Wk 4‚ DQ1 How would you explain the analysis of variance‚ assuming that your audience has not had a statistics class before? When one does a study of data‚ generally this implies an evaluation of the "mean" or average of that data. .i.e. What is the average time it takes a 5th grader to complete his final math exam? A t test is used to test differences between two means. i.e. the mean of the experiment group vs a control group. An ANOVA test‚ on the other hand‚ is indicated when there are
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