Lecture Notes on Introductory Statistics‚ I (P.P. Leung) Lecture notes are based on the following textbook: N.A. Weiss (2012)‚ Introductory Statistics‚ 9th edition‚ Pearson. Chapter 1 The Nature of Statistics 統計本質 §1.1 Two kinds of Statistics §1.4 Other Sampling Designs (其他抽樣方法) Chapter 1 The Nature of Statistics 統計本質 What is Statistics? 何謂統計? From Wikipedia‚ the free encyclopaedia: Statistics is a mathematical science pertaining to the collection‚ analysis‚ interpretation
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the estimated slope for X4 is 0.5174‚ the slope for X1 adjusts to 0.2963 and the slope for X3 adjusts to 1.357. The R2-value is 0.9615 and the mean square error is 16.581. Predictor X2 is not eligible for entry into the stepwise model because its t-test P-value doesn’t meet the 0.05 significance level. We prefer the model containing the three predictors X3‚ X1 and X4‚ because its R2-value is 0.9615‚ which is higher than 0.9330 (the model containing just two predictors X3 and X1) and 0.8047(the model
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This report is about the case study of PAR‚ INC. From the following book: Statistics for Business an Economics‚ 8th edition by D.R. Anderson‚ D.J. Sweeney and Th.A. Williams‚ publisher: Dave Shaut. The case is described at page 416‚ chapter 10. 2. Problem statement Par‚ Inc. has produced a new type of golf ball. The company wants to know if this new type of golf ball is comparable to the old ones. Therefore they did a test‚ which consists out of 40 trials with the current and 40 trials with the
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Lead Summary The back squat exercise is often performed incorrectly and it is the job of the strength and conditioning coach to identify the potential causes of this improper technique that can ultimately lead to future injury. Two common technique errors include the lumbar spine extending into a hyperlordotic position as well as the knees collapsing in a valgus moment during the descent of the back squat. These biomechanical abnormalities and compensations are typically a result of muscular imbalances
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In the lab‚ five test were completed. The Bruce Protocol Test‚ Balke Treadmill Test‚ Q Test‚ Wingate‚ and Cooper Run. The Bruce Protocol Test‚ Balke Treadmill Test‚ and Q Test are GXT test (Graded Exercise Test). The GXT showed how the body responds to exercise. All of these tests were voluntary which allowed the subject to stop before hitting their maximum effort. It will be hypothesized that for each test completed time‚ grade percentage‚ and/or speed made a difference. Everyone has different anaerobic
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In her op-ed piece‚ It Doesn’t Test For Success‚ (Creighton)‚ Joanne V Creighton‚ PHD asserts that standardized test scores such as the SAT’s are no longer useful in predicting the potential successes of today’s students. Dr. Creighton‚ who at the time was President of Mount Holyoke College‚ cited the errors in scoring on the SAT for approximately 4‚000 students. She further stated that while the test may have made sense when first developed‚ it no longer presents an accurate portrait of the potential
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Reading is to the mind what exercise is to the body Long before the invention of printing people valued books as treasure troves of the human knowledge and experience. Hand-written manuscripts took months of writing and were collected and kept in monasteries with all utmost care. Why are they so precious? To my mind‚ a book is one of the greatest wonders in the world. It gives us a unique chance to link up with authors who lived hundreds and thousands years ago. Thanks to the books
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SIMPLE SENTENCE A simple sentence‚ also called an independent clause‚ contains a subject and a verb‚ and it expresses a complete thought. In the following simple sentences‚ subjects are in yellow‚ and verbs are in green. A. Some students like to study in the mornings. B. Juan and Arturo play football every afternoon. C. Alicia goes to the library andstudies every day. | The three examples above are all simple sentences. Note that sentence B contains a compound subject‚ and sentence C contains
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Accounting 3342 Group Test #1 Sept. 10‚ 2014 Problem 1 Below are selected transactions of Blackbird Ltd. for 2014: 1. On May 10‚ the company purchased goods from Jay Corp. for $60‚000‚ terms 2/10‚ n/30. Purchases and accounts payable are recorded at gross amounts. The invoice was paid on May 18. (Use the gross method.) 2. Assume the same information as in (1) above‚ except that the company uses the ‘net method’‚ and payment was made on May 25. 3. On June 1‚ the company purchased
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GM 03 Business Statistics Assignment II Assignment Code: 2012 GM03 B2 Last Date of Submission: 15th November 2012 Maximum Marks: 100 Attempt all the questions. All questions are compulsory and carry equal marks. SECTION – A 1. a) Explain the need for different forecasting techniques. How can we evaluate as to how good is our forecast. b) Collect data on the amount of expenditure you do each day for the next 25 days and
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