1 Statistics & Data I Applications in Business and Economics I Descriptive Statistics I Inferential Statistics Statistics Data overload! I need help! Slide 1 Applications in Business and Economics I I Accounting Public accounting firms use statistical sampling procedures when conducting audits for their clients. Economics Economists use statistical information in making forecasts about the future of the economy or some aspect of it. Statistics Slide
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(-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 EViews command‚ t stands for the appropriate test statistic and d.f are the degrees of freedom. The appropriate test statistic was calculated above‚ namely Z=2.1347. For the degrees of freedom‚ we can insert NA+NB-2. Show @tdist (2
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Scary statistics about book reading July 13‚ 2006 in General by jc | 1 comment I stumbled on Rich Burridge’s weblog post about book statistics‚ it has some scary numbers : Who is Reading Books (and who is not) One-third of high school graduates never read another book for the rest of their lives. Many do not even graduate from high school. 58% of the US adult population never reads another book after high school. 42% of college graduates never read another book. 80% of US families
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Statistics in Business QNT/351 Statistics in Business What is statistics? Statistics is collecting‚ measuring‚ analyzing‚ and communicating data. There are two types of statistics‚ descriptive statistics and inferential statistics (Lind‚ Marchal‚ & Wathen‚ 2011). Statistics are applied in different situations. This paper will describe the role statistics has in making business decisions. This paper will also provide examples of situations in which statistics are applied
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Descriptive Statistics QNT/561 July 29‚ 2014 Descriptive Statistics Job Satisfaction Central Tendency: Mean=8.5 JDI Dispersion: Standard Deviation=1.16 JDI Number: 139 Min/Max: 7 to 10 JDI Confidence Interval: 8.36 to 8.75 JDI *JDI=Job Descriptive Index Months of Employment Central Tendency: Mean= 136.24 Months Dispersion: Standard Deviation= 117.26 Months Number: 139 Min/Max: 1 to 359 Months Confidence Interval: 116.74 to 155.73 Months Descriptive
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Exercise 01 a) Develop a 99 percent confidence interval for the mean selling price of the home. b) Develop a 95 percent confidence interval for the mean distance of the home is from the center of the city. Exercise 02 a) A recent article in Bangladesh Observer indicated that the mean selling price of the homes in the city of Dhaka is more than Tk. 2200. Can we conclude that the mean selling price in the Gulshan area is more than Tk. 2200? Use the 0.01 significance level
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Exercise 36 Answers 1. Since the F value is significant‚ based on the p-value of 0.005 which is less than 0.05 which is sufficient to reject the null hypothesis. This suggests that there is a difference in the control and treatment groups. 2. Since the p- value is less than 0.05 and therefor the null hypothesis can be rejected. This presents that the mean‚ difficulty and mobility scores‚ must be different 3. The result was statistically significant with a probability score of p < 0.001.
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Research and Statistics Paper Psy 315 Define and explain research and define and explain the scientific method (include an explanation of all five steps). Proper Research is primarily an investigation. Researchers and scientists gather data‚ facts‚ and knowledge to help better understand phenomenon‚ events and people. Through research‚ analysis‚ investigations‚ and experimentation‚ we gain a better understanding of our world. As I skimmed the text to find a definition‚ I found the word research
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How to Lie with Statistics Book Summary The book How to Lie with Statistics written by Darrell Huff shows you how statistics are used to mislead; sometimes unintentionally‚ other times on purpose. It gives the readers the knowledge necessary to intelligently question and understand the story behind the numbers. In other words‚ it shows the tricks the crooks use‚ so that honest men can use this knowledge for self defense. I think it’s particularly useful for a manager or an executive to read
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Research Design and Statistics Concepts Worksheet University of Phoenix Managerial Decision Making MBA 510 G. Mark Waltensperger April 2‚ 2008 Research Design and Statistics Concepts Worksheet Concept Application of Concept in Scenario Reference to Concept in Reading Concepts of validity‚ reliability and practicality. Research must be valid and reliable. Validity insures that what is being measured is actually being measured. With out reliability and validity the research becomes questionable
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