new drug for lowering cholesterol. As part of this trial‚ they wish to determine whether there is a difference between the effectiveness for women and for men. Using = .05‚ what is the value the test statistic? Women Men Sample size 50 80 Mean effect 7 6.95 Sample variance 3 4 A. t = 3.252 B. z = 0.455 C. z = 0.081 D. z = 0.151 Answer Key: D Question 2 of 10 1.0 Points A field researcher is gathering data on the trunk diameters of mature
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PROBLEM SHEET – V 1. A sales manager has experience with four different sales approaches and has a large group of salesmen applying each of four approaches (A‚ B‚ C and D). He samples at random from each group‚ thus obtaining the data shown below in the table. Analyze this data using analysis of variance (0.05 level) in testing whether any real difference exists between the four sales approaches as they relate to the successful completion of sales. Rupees of Sale Resulting from Application of Four
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| Caterpillar | 1.8 | McDonald’s | 1.6 | Eastman Kodak | 1.9 | United Technology | 1.5 | Exxonmobil | 2.5 | Wal-Mart Stores | 0.7 | a. What are the mean and median dividend yields? Answer 1. Mean x = ∑xi / n n = 10 large companies = (5.0 + 0.8 + 1.8 + 1.9 + 2.5 +3.7 +3.5 + 1.6 + 1.5 + 0.7) / 10 = 23 / 10 = 2.3 The Mean or average of dividend yield is 2.3 from sample of 10 large companies. 2. Median is the value in the middle when the data are arranged in ascending order.
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deviation of a sample of 100 observations equals 64. The variance of the sample equals a. 8 b. 10 c. 6400 d. 4‚096 ____ 2. The weights (in pounds) of a sample of 36 individuals were recorded and the following statistics were calculated. mean = 160 range = 60 mode = 165 variance = 324 median = 170 The coefficient of variation equals a. 0.1125% b. 11.25% c. 203.12% d. 0.20312% ____3. In a binomial experiment‚ which one(s) of the following is (are) true? (i)
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a. Nominal b. Ordinal c. Interval/ratio d. Experimental 2. What was the mean posttest empowerment score for the control group? - 97.12 3. Compare the mean baseline and posttest depression scores of the experimental group. Was this an expected Finding? Provide a rationale for your answer. The Experimental group’s mean depression baseline score(mean-14.00) was 0.64 points higher than its posttest mean score ( mean-13.36) because on the average the experimental group subjects scored higher on
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graphs. (ii) Calculate the mean and standard deviation for the allocation of income to use at least two methods. Give your comment. SECTION B (i) Collect data from the 5 friends and record your findings in Table 1. (ii) Compare and comment on your findings. (iii) Draw on the same axis‚ (a) line graph (b) bar chart to represent the category of education and recreation for the six families. Give your comments on the two categories. (iv) Find the mean and
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Pronto Pizza is a family-owned pizza restaurant in Vinemont‚ a small town of 20‚000 people in upstate New York. Antonio Scapelli started the business 30 years ago as Antonio ’s Restaurant with just a few thousand dollars. Antonio‚ his wife‚ and their children‚ most of whom are now grown‚ operate the business. Several years ago‚ one of Antonio ’s sons‚ Tony‚ Jr.‚ graduated from NYU with an undergraduate degree in business administration. After graduation‚ he came back to manage the family business
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your results and draw conclusions. So what are descriptive and inferential statistics? And what are their differences?We have seen that descriptive statistics provide information about our immediate group of data. For example‚ we could calculate the mean and standard deviation of the exam marks for the 100 students and this could provide valuable information about this group of 100 students. Any group of data like this‚ which includes all the data you are interested in‚ is called a population. A population
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[pic] THE PREFERRED REFERENCE BETWEEN BOOKS AND INTERNET IN DOING ASSIGNMENTS OF THIRD YEAR AND FOURTH YEAR STUDENTS OF ASIAN COMPUTER COLLEGE-MAYAPA SCHOOL YEAR 2011-2012 A Secondary Thesis Presented by: Keng‚ Van Wesley A. Rosete‚ Newehlene E. Crencia‚ Janice M. De Belen‚ Lalein A. Magnate‚ Angelica B. March 2012 [pic]
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Key Questions Calculate the mean monthly returns and return standard deviations for each of the 30 stocks in the tab "Tbill‚ S&P‚ Dow 30 mo retns" of the Capital Market Returns Data spreadsheet. A) Create a column of monthly returns for a portfolio that each month was invested equally across the 30 stocks. Calculate the mean and standard deviation of returns of this portfolio and explain how they relate to the mean returns and standard deviations of return of the 30 stocks individually. B)
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