is case study of Par‚ Inc. Par‚ Inc.‚ is a manufacturer of golf equipment. The company wants to check whether this new type of golf ball is comparable to the old ones. Therefore they did a test with 40 samples of both new balls and old ones. The testing was performed with a mechanical hitting machine so that any difference between the mean distances for the two models could be measure to evaluate the difference in the two models‚ presented with the sample size of 40 and confidence level of 95%.
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get N1= N2= 156 In the window above‚ change the N1=200 (control group)‚ N2=120 (testing group)‚ and select Independent in Allocation‚ thus I get .9046 to be the power. =((61-64.5)-(0))/√((16*16)/200+(13*13)/120) = (-3.5)/1.6396 = -2.1347 Critical Value: Zα/2= Z0.05/2= @qnorm(1-0.05/2)= 1.96 When comparing the test statistic to the critical value: Z=2.1347>1.96‚ we reject the null hypothesis. We can calculate the P-value using the EViews command: Show @tdist (t‚ d.f) In this
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Introduction A woman entrepreneur is defined as a woman who has alone or with one or more partners started or inherited a business‚ and is eager to take financial‚ administrative‚ and social risks and responsibilities‚ and participate in the day-to-day management activities (UNDP‚ 2004). Women in Asian countries like India‚ Myanmar and Bangladesh have played and also are playing a good role in politics. So‚ Bangladeshi women are enjoying freedom to join politics as well as business. But compared
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households with rainwater tanks between the two towns. b) Can pleasant aromas help a student learn better? There is reason to believe that the presence of a floral scent can improve a person’s learning ability in certain situations. To test this hypothesis‚ 50 people were randomly assigned to one of two treatment groups. One group worked through a set of pencil and paper mazes while wearing a floral-scented mask. The other group performed the same tasks while wearing an unscented mask. Testers
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MAT 300 M&Ms® Project Part 5 (3 pts) Using the methods in Section 8.4‚ test the hypothesis (α = 0.05) that the population proportions of red and brown are equal (pred = pbrown). You are testing if their proportions are equal to one another‚ NOT if they are equal to one another AND equal to 13%. NOTE: These are NOT independent samples‚ but we will use this approach anyway to practice the method. This also means that n1 and n2 will both be the total number of candies in all the bags. The
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negative feelings could affect the way we answer the questions. In contrast‚ construct validity measures the way other variables are related within a system. “Basically‚ construct validity implies that the developers of standardized instruments form hypothesis
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children on the autism spectrum who also have irritable behaviors‚ such as attention deficit hyperactivity disorder or disruptive behavior disorders. The focus is on what question the authors are trying to answer by doing this research and what hypothesis is being tested and the concepts that were applied in this process. Other important aspects of this study include the statistical analysis employed in this studies‚ the variables used and the possibility more and/or different variables may have
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3.6.2 Correlation Analysis Correlation analysis is one of the data analysis method use in quantitative research when researchers intended to examine the relationship between both variables (Research Methodology‚ n.d.). The Pearson’s Moment Correlation Coefficient (PMCC) ranges between +1 and -1.If the coefficient value is +1 and -1‚ it is an indication that the relationships between both variables are strong. A value of +1 indicate that there is a positive relationship between variables‚ means that
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PART I. HYPOTHESIS TESTING PROBLEM 1 A certain brand of fluorescent light tube was advertised as having an effective life span before burning out of 4000 hours. A random sample of 84 bulbs was burned out with a mean illumination life span of 1870 hours and with a sample standard deviation of 90 hours. Construct a 95 confidence interval based on this sample and be sure to interpret this interval. Answer Since population standard deviation is unknown‚ t distribution can be used construct
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Contents Introduction 3 TASK 1 4 TASK 2 – Graphs and calculations 5 Mean‚ standard deviation‚ mode‚ etc. 6 Mean and Standard Deviation of a Frequency distribution 6 Work satisfaction 6 Working condition 13 Effective management 19 Stress in Workplace 25 TASK 3 – t-test 31 TASK 4 – Correlation and Regression 33 TASK 5 – Summary 35 BIBLIOGRAPHY 36 APPENDIX 1. 37 300 random numbers 37 30 selected random numbers from random array. 38 APPENDIX 2. 39 Sample of 30 records
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