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.a．Mnually calculate the 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
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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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Construct Label for a theoretical dimension with which people differ i.e. anger Meaning of the construct in abstract Measuring in a way that is measurable Acquiring Knowledge- Methods Empirical- based on experience and observations Objective- everyone perceives the same way Anxiety Uneasy and distress related to uncertainty of the future i.e. self report‚ sweaty palms‚ heart rate Characteristics of Science and the Scientific approach Control Tentative Self-correcting/replication Progressive
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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 Step 5. Since 2.66>2.365 we will reject the null hypothesis/HO
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inches. What is the 99% confidence interval for the true mean length of the bolt? Student Answer: 2.902 to 3.098 2.884 to 3.117 2.865 to 3.136 2.228 to 3.772 2.465 to 3.205 Comments: 4. Question : A federal bank examiner is interested in estimating the mean outstanding defaulted loans balance of all defaulted loans over the last three years. A random sample of 20 defaulted loans yielded a mean of $67‚918 with a standard deviation of
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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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CHAPTER 4 – SENSATION AND PERCEPTION I. SENSORY AWARENESS * Sensation is the awareness or a mental process which is aroused due to the stimulation of the senses. * The activation of a sense organ using physical energy that processes the receiving of stimulus from the external environment. A. Stimulus – anything that arouses a sense organ to activity. B. Receptor organs – a highly specialized part of the body selectively sensitive to a definite stimulus. C. Sensory receptors
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Garrison 14e Practice Exam – Chapter 4 Print these pages. Answer each of the following questions‚ explaining your answers or showing your work‚ and then compare your solutions to those provided at the end of the practice exam. 1. Hooker Company uses the weighted-average method in its process costing system. The following data about the Packaging Department were taken from the company’s accounting records: • There were no units in the work in process inventory and 150‚000 units in the
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Brain‚ Nutrition and ADHD. Retrieved from http://www.sevencounties.org/ website. Duca‚ R. (2010). Nutritional Considerations in the Management of Attention Deficit Hyperactivity Disorder. Nutritional Perspectives: Journal Of The Council On Nutrition‚ 34(4)‚ 5-16. Davis‚ B.L. (2007). Decision Rule for Hypothesis Testing. Retrieved from http://home.chpc.utah.edu/ website.
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