ECO 72 INTRODUCTION TO ECONOMIC STATISTICS Topic 2 Measures of Central Tendency These slides are copyright © 2003 by Tavis Barr. This material may be distributed only subject to the terms and conditions set forth in the Open Publication License‚ v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). Measures of Central Tendency This chapter looks at three different concepts of how we describe a “typical” element of a data set. Mean
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Introduction The current state of the world economy is quite uncertain. Economic statistics that governments and other financial institutions use to project the economy imply that the world economy is shrinking. Since 2008‚ the state of the American economy has not been attractive. For instance‚ the United States economy has not registered any significant growth for the last three years. The 2011 second quarter results indicated that gross domestic product improved by 1%. At the same time‚ there
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either increase or decrease on the scale. Therefore‚ even the number of crimes which are reported by the media‚ do not show competency and thus deemed inaccurate. According to Highfield (2014) "Those numbers‚ however‚ are not entirely accurate" (par. 2). Several factors such as family conditions‚ criminogenic environment and the collapse of a community may greatly impact and discredit the common hypothesis of the individuals’ apparatus of the reduction of crime rate. A tremendous amount of crimes
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Chapters 1-3:In order to control costs‚ a company wishes to study the amount of money its sales force spends entertaining clients. The following is a random sample of six entertainment expenses (dinner costs for four people) from expense reports submitted by members of the sales force. $157‚ $132‚ $109‚ $145‚ $125‚ $139. Calculate the mean and sample variance(s^2) and standard deviation. Mean = 807/6 = 134.5. Sample Variance = (109925 – (807^2/6)/6-1 = (109925 – 108541)/5 = 1384/5 = 276.8.
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1. The three components of leadership are: 1.) influencing others‚ 2.) providing direction‚ and: ***getting voluntary acceptance 2. Comparing an organization’s strengths and weaknesses with its competitors is part of: PG 435 Not Self Assessment ***Competitor Analysis 3. Staff scheduling using information technology is only applicable to large organizations. ***False 4. When compared to public relations‚ marketing is: PG 430 Not Broader in scope 5. Which of the following types of
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Hypothesis: Ho: P = .10 (Mr. Plex and consortium will seriously consider settlement) H1: P < .10 (Mr. Plex and consortium will rigorously defend any lawsuit by Tommy) Analysis： For this case‚ we use 0.01 as the significance level. In a hypothesis test‚ a Type I Error occurs when the null hypothesis is rejected when it is in fact true. That means if the consortium decides to consider a settlement when greater than 10% of the patrons resented ads/commercials is true and we reject the null hypothesis
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Expanding Ideas in WellConstructed Paragraphs A paragraph is composed of a group of sentences expressing one central idea. A paragraph is complete in itself and also a subdivision or part of something larger such as a composition. The Topic Sentence: The topic sentence is one sentence that introduces the topic of your paragraph. Topic sentences often act like tiny thesis statements. A topic sentence makes a claim of some sort. The topic sentence must be the unifying force in the paragraph. When
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To what extent has the conservative party abandoned Thatcherism? (25 marks) The conservative party accepts that a degree of state intervention to create more social justice can be justified. This may involve welfare‚ but also intervention in family situations‚ in education and through social services in general. There is a sense that we are responsible for the welfare of those less fortunate than ourselves. Thatcherism suggested that we are responsible for ourselves as long as we have the capability
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Sugar Content of Popular Cereals Purpose: Analyze and compare sugar content of popular cereals with the same serving size. Cereal is a staple in my home‚ but chosen for different reasons. Cereals that are popular with kids are starting to advertise more fiber and grains‚ which capture a parent’s eye. Is eating a blander colored cereal really more healthy than a vibrant colored one? | | | | | | | | | | | | | | | | | | | | | | Category(X): | Cheerios | Crispix
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Coordinate Algebra Name: _____________________ 4.2.3 Residuals Date: _____________________ Introduction The fit of a linear function to a set of data can be assessed by analyzing__________________. A residual is the vertical distance between an observed data value and an estimated data value on a line of best fit. Representing residuals on a___________________________ provides a visual representation of the residuals for a set of data. A residual plot contains the points:
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