distribution‚ the mean and the median are not equal. d. The graph of a normal distribution is symmetric. (Correct) Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 50% b. Relative frequency of scores less than 120 84% c. Percentage
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Chapter 3‚ Problem 3 Using published sources (for example‚ The Wall Street Journal‚ Barron’s‚ Federal Reserve Bulletin)‚ look up the exchange rate for U. S. dollars with Japanese yen for each of the past 10 years (you can use an average for the year or a specific time period each year). Japanese Yen to U. S. Dollar (Retrieved from http://research.stlouisfed.org/fred2/data/EXJPUS.txt ) Date Example - Japan Stock Price in Yen Example -
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highest income‚ the minimum being 4‚018.44 and the maximum being 995‚610.14. Statistics Household Income N Valid 70 Missing 0 Std. Deviation 291786.49129 Variance 85139356497.915 Standard deviation and variance: The average distance of the observations from the mean is 291786.49129 and the variance is simply the square of the standard deviation. This denotes that the household incomes are extremely dispersed from each other. Statistics Household Income N Valid 70
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3.5‚ 4‚ 3.9‚ 4‚ 3‚ 4.5‚ 4.9‚ 3‚ 3.3‚ 3 Mode = 4 Females 4.2‚ 4.1‚ 4.2‚ 4.6‚ 3.9‚ 4.1‚ 4.7‚ 4.1‚ 4.2‚ 4‚ 4.2‚ 4.1‚ 4‚ 4.5‚ 4.3‚ 3.9‚ 4‚ 3.7 Mode = 4.1 & 4.2 Variability Xbar –x = 4.16 – 3.85 =0.31 Standard Deviation Males Mean Deviation Deviation Squared Females Mean Deviation Deviation Squared 4 3.85 0.15 0.0225 4.2 4.16 0.04 0.0016 4.6 3.85 0.75 0.5625 4.1 4.16 -0.06 0.0036 3.2 3.85 -0.65 0.4225 4.2 4.16 0.04 0.0016 3.9 3.85 0.05 0.0025 4.6 4.16 0.44 0.1936 4.2 3.85 0.35 0.1225
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Each problem/question is worth 3 points. Please label your answers with the correct chapter and problem in the submission area. • Chapter 1: Exercises 2‚ 3‚ and 6 • Chapter 2: Exercises 1‚ 5‚ and 6 Chapter 1: Exercises 2‚ 3‚ and 6 2.Shareholders want high long-term profits. Managers want job security and wonderful perks and amenities. Since risk and return tend to be positively related‚ managers may wish to avoid risks that shareholders want the managers to undertake. To encourage managers
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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 can be
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5 to size 14 amongst the participants. With these ranges‚ the mean is 9.142‚ with a standard deviation of 2.583 and a variance of 6.670. Appendix B: Male vs. Female data sets‚ show the mean‚ standard deviation and variance for both of these sets respectively. Female data sets have a mean of 7.111‚ standard deviation of 1.131‚ and a variance of 1.281 whereas the males have a mean of 11.294‚ a standard deviation of 1.803‚ and a variance of 3.251. The T-test was applied to these two data sets to
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cluster between $1‚000 and $2‚250. The standard deviation of the checking account balances 596905 and the range is 2525. The first quartile shows that 25 percent of the data are lower 1122.50 and the third quartile shows that 75 percent of the data are lower 1935.50. The standard deviation is the positive square root of the variance. It is a measure of variability used in statistics. It shows how much variation exists from the average. A low standard deviation indicates that the data points tend to
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Discovering Statistics Using SPSS by Mediasamenvattingen2011 The Marketplace to Buy and Sell your Study Material Buy and sell all your summaries‚ notes‚ theses‚ essays‚ papers‚ cases‚ manuals‚ researches‚ and many more.. www.stuvia.com Stuvia.com - The Marketplace to Buy and Sell your Study Material - Field: Discovering Statistics Using SPSS chapter 1‚ 2‚ 3‚ 6‚ 7‚ 8‚ 9‚ 10‚ 11‚ 17‚ 18 Field Chapter 1: Why is my evil lecturer forcing me
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which of the following might be a reasonable first class? (a) 0 to 25 _ (2) Give that a sample of 25 had x = 75‚ and (x-x)² = 48 the mean and standard deviation are _ (c) X = 3.0 and S = 48/24 (3) Which of the following is always true for a test of a hypothesis? (a) The type
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