Chapter 11 Questions to be graded: 5. Were the experimental and control groups similar in their type of feeding? Provide a rationale for your answer. Answer: Yes the experimental and control groups are similar in their feeding type because 40.6% in the experimental group decided to breast-feed‚ and 41.7% in the control group decided to breast-feed‚ that’s only 1.1% difference. 53.1% of the experimental group bottle-fed while 50.0% of the control group bottle-fed‚ a small 3.1% difference. Finally
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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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use the entire dataset back to 1880. 3. The true statements are (c) and (e). The explanations follow. Statement (c): Let = the annual standard deviation of the risky investments and 1 = the standard deviation of the first investment alternative over the two-year period. Then: 1 2 Therefore‚ the annualized standard deviation for the first investment alternative is equal to: 1 2 2 5-1 Statement (e): The first investment alternative is more attractive
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providing a dental insurance plan. A random sample of 12 employees reveals the following family dental expenses (in dollars): 115‚ 370‚ 250‚ 593‚ 540‚ 225‚ 177‚ 425‚ 318‚ 182‚ 275‚ and 228. Construct a 90% confidence interval estimate for the standard deviation of family dental expenses for all employees of this corporation. Place your LOWER limit‚ in dollars rounded to 1 decimal place‚ in the first blank. Do not use a dollar sign‚ a comma‚ or any other stray mark. For example‚ 123.4 would be a legitimate
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using the mean would make it appear that the “average” person makes more money than is actually the case. True or false: The standard deviation and the range are sensitive to outliers. Explain your response. (1 point) True-the standard deviation is sensitive because variability exists in a set of scores that deviate from the mean. True or false: The standard deviation can never be 0. Explain your response. (1 point) False-if the SD can be zero then the variance can also be zero. If variance of zero
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that domestic and foreign equity yields the same real return‚ with a slightly higher standard deviation for the latter one. This would imply that they would be better off investing solely on domestic equities. However‚ under the 2.a assumptions‚ since they have a 0.6 correlation‚ foreign equities will be part of the optimal portfolio. 3 – By using the estimates of expected returns‚ standard deviations and covariances among the asset classes‚ I will create N weights for each asset summing up to 100%
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1) The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0. Suppose 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 71. 2) At a computer manufacturing company‚ the actual size of computer chips is normally distributed with a mean of 1 centimeter and a standard deviation of 0.1 centimeter. A random sample of 12 computer chips is taken. What is the probability that the sample
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standard deviation for 2003 was $2000. What is the probability the sample mean will be within +-$300 of population mean? ! ! ! ! ! ! ! ! ! ! ! ! ! ! Question 2: Referring to Question 1‚ what is the probability the sample mean will be greater than $7500? ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Question 3: The mean television viewing time for Americans is 15 hours per week. Suppose a sample of 60 Americans is taken to further investigate viewing habits. Assume the population standard deviation for
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tools to scrutinize the market and identify the most succulent securities available for their clients‚ to accomplish this objective they utilize different mathematical and statistical calculations like arithmetic mean‚ geometric mean and standard deviation‚ this paper shows how to perform these calculations and how they could be used to identify a good investment. Additionally‚ provides an overview in formulating and justifying investment policies identifying objectives and constraint considerations
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into each of these rings every 2 meters along the trajectory is calculated‚ as well as the standard deviation. These particular elevation means and standard deviations are calculated for all the rings on every road. The values of average elevation and standard deviation refer to points which are located definitely on the roads‚ and can be used in order to determine the mean and standard deviation parameters of the Gaussian curve for each ring. The fuzzy logic Gaussian membership function is applied
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