第十三章簡單線性回歸分析-1-資料下載頁
2025-08-01 13:37本頁面
【正文】 3. 解說其意義 4. 若有一家店的架位數(shù)為 10的話，請估計其業(yè)績 sales 5. 將第 12家店之業(yè)績 sales改為 14部份，並比較結(jié)果 13 71 銘傳應(yīng)用統(tǒng)計系 使用 PHStat解範例 4 In excel, use PHStat | regression | simple linear regression … EXCEL spreadsheet of regression sales on Petfood(496頁，習題 ） 13 72 銘傳應(yīng)用統(tǒng)計系 使用 PHStat解範例 5題目 某大型連鎖店物流部經(jīng)理，想了解包裹運送業(yè)績與擁有顧客數(shù)間的關(guān)聯(lián)。以作為營業(yè)額估計的依據(jù)，於是隨機抽取了連鎖物流店中的 20家店。並記錄了此 20家店的顧客人數(shù)以及每週銷售額。 資料如檔案 Package所示： 13 73 銘傳應(yīng)用統(tǒng)計系 使用 PHStat解範例 5 1. 繪出Ｘ與Ｙ散布圖 2. 估計迴歸直線之截距與斜率 3. 解說其意義 4. 若有一家店的顧客數(shù)為 600請估計該店的平均業(yè)績。 5. 若有第 19家店的顧客數(shù)為 ，請重估計其業(yè)績 sales，並比較 14部份的結(jié)果 13 74 銘傳應(yīng)用統(tǒng)計系 使用 PHStat解範例 5 In excel, use PHStat | regression | simple linear regression … EXCEL spreadsheet of regression sales on Petfood(496頁，習題 ） 13 75 銘傳應(yīng)用統(tǒng)計系 今日課程複習 1. 簡單線性迴歸模型的描述 2. 最小平方法的觀念與應(yīng)用 3. 簡單迴歸模型參數(shù)之估計 13 76 銘傳應(yīng)用統(tǒng)計系 測驗與解答 1 The least squares method minimizes which of the following? a) SSR b) SSE c) SST d) All of the above 單選題： ANSWER: b 13 77 銘傳應(yīng)用統(tǒng)計系 測驗與解答 2 The Yintercept (b0) represents the a) predicted value of Y when X = 0. b) change in Y per unit change in X. c) predicted value of Y. d) variation around the line of regression. 單選題： ANSWER: a 13 78 銘傳應(yīng)用統(tǒng)計系 測驗與解答 3 The slope (b1) represents a) predicted value of Y when X = 0. b) the average change in Y per unit change in X. c) the predicted value of Y. d) variation around the line of regression. 單選題： ANSWER: b 13 79 銘傳應(yīng)用統(tǒng)計系 測驗與解答 4 In performing a regression analysis involving two numerical variables, we are assuming a) the variances of X and Y are equal. b) the variation around the line of regression is the same for each X value. c) that X and Y are independent. d) all of the above. 單選題： ANSWER: b 13 80 銘傳應(yīng)用統(tǒng)計系 測驗與解答 5 The residuals represent a) the difference between the actual Y values and the mean of Y. b) the difference between the actual Y values and the predicted Y values. c) the square root of the slope. d) the predicted value of Y for the average X value. 單選題： ANSWER: b 13 81 銘傳應(yīng)用統(tǒng)計系 測驗與解答 6 Which of the following assumptions concerning the probability distribution of the random error term is stated incorrectly? a) The distribution is normal. b) The mean of the distribution is 0. c) The variance of the distribution increases as X increases. d) The errors are independent. 單選題： ANSWER: c 13 82 銘傳應(yīng)用統(tǒng)計系 綜合測驗與解答 TABLE 163 The director of cooperative education at a state college wants to examine the effect of cooperative education job experience on marketability in the work place. She takes a random sample of four students. For these four, she finds out how many times each had a cooperative education job and how many job offers they received upon graduation. These data are presented in the table below. Student CoopJobs JobOffer 1 1 4 2 2 6 3 1 3 4 0 1 13 83 銘傳應(yīng)用統(tǒng)計系 綜合測驗與解答 1 Referring to Table 163, set up a scatter diagram. ANSWER S c at t e r D i agr am01234560 1 2C oop Jo b sJob Offers13 84 銘傳應(yīng)用統(tǒng)計系 綜合測驗與解答 2 the least squares estimate of the slope is __________. the least squares estimate of the Yintercept is __________. the prediction for the number of job offers for a person with 2 Coop jobs is __________. the total sum of squares (SST) is __________. 填充題： ANSWER: ANSWER: ANSWER: ANSWER:
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