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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6.14 Show that for a sample of n = 39‚ the smallest and largest Z values are – 1.96 and + 1.96‚ and the middle (i.e.‚ 20th) Z value is 0.00. 6.19 The data in the file spending represent the per-capita spending‚ in thousands of dollars‚ for each state in 2004. Decide whether the data appear to be approximately normally distributed by A. Comparing data characteristics to theoretical properties. B. Constructing a normal probability plot. 7.1. For a population containing N=902 individuals what code number
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2/8 (Friday) Standard Deviation cont’d Example: Amount of money earned by new immigrants Sample: 12‚ 15‚ 16‚ 20‚ 25‚ 36‚ 40 Step 1: Find the mean * x̄=164/7 * mean is 23.4 Step 2: Find how much each observation deviates from the mean * 12 - 23.4 = -11.4 * 15 – 23.4 = -8.4 * 16 – 23.4 = -7.4 * 20 – 23.4 = -3.4 * 25 – 23.4 = 1.6 * 36 – 23.4 = 12.6 * 40 – 23.4 = 16.6 * Note: all observations below mean will be negative‚ all above will be positive Step
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Parent Tree Augmented Naive Bayes (LSPTAN) that seeks to solve the problems discussed above‚ enabling the application of a semi-Naive Bayes techniques in large ADC tasks. Thus‚ we can evaluate whether the premise of independence among attributes‚ assumed by Naive Bayes‚ impacts effectiveness in large ADC tasks‚ an open research problem.\looseness=-1 The Lazy Super Parent TAN (LSPTAN) heuristic is a postergated version of the SP-TAN that constructs a Tree Augmented Naive Bayes for each test example. Attributes
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differential voltage at zero. The output of the op-amp will be the product of input voltage and the gain set by the feedback. A commonly used op-amp is A741 with the pin diagram and symbol as shown below: 1 – Offset null 1 5 – Offset null 2 2 – Inverting input 6 – Output 3 – Non-inverting input 7 – Positive DC supply 4 – Negative DC Supply 8 – Not connected OVERVIEW Part A: Measurement of offset parameters The circuit configuration was constructed as shown in Figure 1‚ which VCC
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MBA 501A – [STATISTICS] ASSIGNMENT 4 INSTRUCTIONS: You are to work independently on this assignment. The total number of points possible is 50. Please note that point allocation varies per question. Use the Help feature in MINITAB 16 to read descriptions for the data sets so that you can make meaningful comments. [10 pts] 1. Use the data set OPENHOUSE.MTW in the Student14 folder. Perform the Chi Square test for independence to determine whether style of home and location are are related.
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1. Include a summary for each variable in the data set. Make comments and interpretations based on maximum and minimums‚ well as the appropriate means and proportions. What new insights do these descriptive statistics provide concerning Asia-Pacific business schools? Analysis: 1. Full time enrolment is highest in Indian Institute of Management (Calcutta)‚ 463 and lowest in Macquaire Graduate School of Management (Sydney)‚12 as per data available from the full time enrolment. They are far above
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Chapter 1 INTRODUCTION 1.1 INTRODUCTION The Islamic republic of Pakistan emerged as an independent sovereign state on 14th August 1947‚ as a result of the division of former British India. It lies between 23-35 to 37- 05 north latitude and 60-50 to 77- 50 east longitude touching the Hindukush Mountains in the north and extending from the Pamirs to the Arabian Sea. Pakistan is situated at the junction of three major regions of Asia: Central Asia to the north‚ the Middle East to the west and
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Analyzing a Web Page BSHS/352 Analyzing a Web Page When using the internet for research‚ you want your information from your sources to be reliable‚ persuasive and credible. You have to evaluate each source carefully for credibility. It is very important to enter the correct search information‚ or you might find yourself drowning in web pages and links that are not reliable or credible. As I researched sources for human services resources to analyze‚ I found a site on
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shown below. Day Stock Price 1 84 2 87 3 84 4 88 5 85 6 90 7 91 8 83 9 82 10 86 For the above sample‚ compute the following measures. a. b. c. The mean = ∑X/n = 860/10 = 86 The median = (85+86)/2 = 85.5 The variance = ∑ X - X 2/ n-1 = {(84-86)2 + (87-86)2 + (84-86)2 + (88-86)2 + (85-86)2 + (90-86)2 + (91-86)2 + (83The standard deviation = √8.89 = 2.98 The coefficient of variation = 2.98/86 * 100% = 3.47% 86)2 + (82-86)2 + (86-86)2 } / (10 -1) = 8.89 d. f. 2. In 2008‚ the average age of students
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