08 ETHE AUSTRALIAN NATIONAL UNIVERSITY SCHOOL OF FINANCE AND APPLIED STATISTICS First Semester Examination 2010 QUANTITATIVE RESEARCH METHODS (STAT1008) Writing Period: 3 hours duration Study Period: 15 minutes duration Permitted Material: Non-programmable calculator‚ dictionary and 1 A4 page with notes on both sides Instructions to Candidates: • Attempt ALL questions. • Each question is of equal mark value. • Start your solution to each question on a new page. • To ensure full marks
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Problems on Regression and Correlation Prepared by: Dr. Elias Dabeet Q1. Dr. Green (a pediatrician) wanted to test if there is a correlation between the number of meals consumed by a child per day (X) and the child weight (Y). Included you will find a table containing the information on 5 of the children. Use the table to answer the following: Child Number of meals consumed per day (X) child weight (Y) X² Y² XY Ahmad 11 8 121 64 88 Ali 16 11 256 121 176 Osama 12 9 144
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Chapter 12 Simple Linear Regression Case Problem 1: Measuring Stock Market Risk a. Selected descriptive statistics follow: Variable N Mean StDev Minimum Median Maximum Microsoft 36 0.00503 0.04537 -0.08201 0.00400 0.08883 Exxon Mobil 36 0.01664 0.05534 -0.11646 0.01279 0.23217 Caterpillar 36 0.03010 0.06860 -0.10060 0.04080 0.21850 Johnson & Johnson 36 0.00530 0.03487 -0.05917 -0.00148 0.10334
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phenomena of crime what about rape‚ homicide etc. that would be adding more variables to the set so that you can measure all different types of crime and get the actual rate of crime. 2. Differentiate between descriptive statistics and inferential statistics. a. Descriptive statistics summarizes and describe the data on cases included in the study. You are only describing what’s going on with the data from the case at hand. For example‚ you interviewed 100 people about which fast food restaurant had
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Question 1: Available on MyStatLab. Question 2: Two polls (each based on a random sample of 1000) released just before the recent Ontario provincial election seemed to suggest conflicting outcomes. The breakdown in percentages for the two polls were: Liberal PC NDP Green Angus Reid 33% 36% 26% 5% Ekos 37.7% 31.5% 23.3% 5.9% (a) Test at the .05 level of significance whether the data constitute evidence of a real overall disagreement between the two polls. (b) In
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SECTION A (You should attempt all 10 questions) A1. Regression analysis is ____________________________________. A) describes the strength of this linear relationship. B) describes the mathematical relationship between two variables. C) describes the pattern of the data. D) describes the characteristic of independent variable. A2. __________________ is used to illustrate any relationship between two variables. A) Histogram B) Pie chart C) Scatter diagram D) Frequency
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Name Assignment QNT/561 Date Descriptive Statistics Sales (in USD) The distribution is normally distributed. Central Tendency: Mean = 42.84 dollars. Dispersion: Standard deviation = 9.073 dollars. Count: 100 Min/Max: Min is $23.00; Max is $64.00 Confidence Interval (alpha = 0.05): $41.06 to $44.62 The histogram is present in Appendix A; the descriptive statistics are present in Appendix B. Age The distribution is not normally distributed. Central Tendency: Median = 35 years Dispersion:
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Case Study 2: Bodegas Caballé – An International Recruitment Exercise Bodegas Caballé – An International Recruitment Exercise Dear Mr. Caballé‚ Dear Bodegas Caballé Selection Committee‚ First of all we would like to thank you for putting trustfulness in our work as newcomers in your company Bodegas Caballé. After considering the commissioning letter and the four reports we have analysed them carefully to make a reasonable choice‚ who is the most suitable applicant. We established
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Performance Appraisal Tools and Techniques inShare 4 Following are the tools used by the organizations for Performance Appraisals of their employees. Ranking Paired Comparison Forced Distribution Confidential Report Essay Evaluation Critical Incident Checklists Graphic Rating Scale BARS Forced Choice Method MBO Field Review Technique Performance Test We will be discussing the important performance appraisal tools and techniques in detail. Ranking
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Homan’s law of inequality focuses on two assumptions. First‚ friendships are usually among people with similar rankings in society. Second‚ there are some people that break these rules by having strong bonds with members of another social rank. These people generally do not have strong social bonds with people of their own rank. The base reason that people generally stick together with people of their own rank is because of convenience due to similar living situations‚ educational background‚ and
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