Basic Business Statistics, Student Value Edition
14th Edition
ISBN: 9780134685113
Author: Mark L. Berenson, David M. Levine, David F. Stephan, Kathryn Szabat
Publisher: PEARSON
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Chapter 17, Problem 22PS
a.
To determine
Conduct a multi-dimensional scaling analysis based on mean connection speed, mean peak connection speed, the percent of the time the speed is above 4 Mbps and the percent of the time the connection speed is above 10 Mbps.
b.
To determine
Write a conclusion on countries that are similar.
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2 (VaR and ES) Suppose X1
are independent. Prove that
~
Unif[-0.5, 0.5] and X2
VaRa (X1X2) < VaRa(X1) + VaRa (X2).
~
Unif[-0.5, 0.5]
8 (Correlation and Diversification)
Assume we have two stocks, A and B, show that a particular combination
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the return of A and B is -1.
9 (Portfolio allocation)
Suppose R₁ and R2 are returns of 2 assets and with expected return and
variance respectively r₁ and 72 and variance-covariance σ2, 0%½ and σ12. Find
−∞ ≤ w ≤ ∞ such that the portfolio wR₁ + (1 - w) R₂ has the smallest
risk.
Chapter 17 Solutions
Basic Business Statistics, Student Value Edition
Ch. 17 - The business problem facing a consumer products...Ch. 17 - Prob. 2PSCh. 17 - Prob. 3PSCh. 17 - The owner of a moving company typically has his...Ch. 17 - A hotel has designed a new system for room service...Ch. 17 - A marketing manager wants to predict customers...Ch. 17 - An automotive insurance company wants to predict...Ch. 17 - Undergraduate students at Miami University in...Ch. 17 - Prob. 9PSCh. 17 - The file Cereals contains the calories,...
Ch. 17 - The file Protein contain calorie and cholesterol...Ch. 17 - Prob. 12PSCh. 17 - The file MobileSpeed contains the overall download...Ch. 17 - Prob. 14PSCh. 17 - Prob. 15PSCh. 17 - Prob. 16PSCh. 17 - Prob. 17PSCh. 17 - Prob. 18PSCh. 17 - Prob. 19PSCh. 17 - Prob. 20PSCh. 17 - Prob. 21PSCh. 17 - Prob. 22PSCh. 17 - What is the difference between supervised and...Ch. 17 - Prob. 24PSCh. 17 - Prob. 25PSCh. 17 - How does cluster analysis differ from...Ch. 17 - Prob. 27PSCh. 17 - Prob. 28PSCh. 17 - The file FTMBA contains a sample of top-ranked...Ch. 17 - Prob. 30PSCh. 17 - Prob. 31PSCh. 17 - Prob. 32PSCh. 17 - Prob. 33PSCh. 17 - Prob. 34PSCh. 17 - Prob. 35PSCh. 17 - In recent years, the share of Greek yogurts in the...
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- 7 (Multivariate random variable) Suppose X, €1, €2, €3 are IID N(0, 1) and Y2 Y₁ = 0.2 0.8X + €1, Y₂ = 0.3 +0.7X+ €2, Y3 = 0.2 + 0.9X + €3. = (In models like this, X is called the common factors of Y₁, Y₂, Y3.) Y = (Y1, Y2, Y3). (a) Find E(Y) and cov(Y). (b) What can you observe from cov(Y). Writearrow_forward1 (VaR and ES) Suppose X ~ f(x) with 1+x, if 0> x > −1 f(x) = 1−x if 1 x > 0 Find VaRo.05 (X) and ES0.05 (X).arrow_forwardJoy is making Christmas gifts. She has 6 1/12 feet of yarn and will need 4 1/4 to complete our project. How much yarn will she have left over compute this solution in two different ways arrow_forward
- Solve for X. Explain each step. 2^2x • 2^-4=8arrow_forwardOne hundred people were surveyed, and one question pertained to their educational background. The results of this question and their genders are given in the following table. Female (F) Male (F′) Total College degree (D) 30 20 50 No college degree (D′) 30 20 50 Total 60 40 100 If a person is selected at random from those surveyed, find the probability of each of the following events.1. The person is female or has a college degree. Answer: equation editor Equation Editor 2. The person is male or does not have a college degree. Answer: equation editor Equation Editor 3. The person is female or does not have a college degree.arrow_forwardneed help with part barrow_forward
- Suppose you know that Bob's test score is above the mean, but he doesn't remember by how much. At least how many students must score lower than Bob?arrow_forwardIf a baby's weight is at the median, what's her percentile?arrow_forwardAt the same restaurant as in Question 19 with the same normal distribution, what's the chance of it taking no more than 15 minutes to get service?arrow_forward
- Clint, obviously not in college, sleeps an average of 8 hours per night with a standard deviation of 15 minutes. What's the chance of him sleeping between 7.5 and 8.5 hours on any given night? 0-(7-0) 200 91109s and doiw $20 (8-0) mol 8520 slang $199 galbrog seam side pide & D (newid se od poyesvig as PELEO PER AFTE editiw noudab temand van Czarrow_forwardTimes to complete a statistics exam have a normal distribution with a mean of 40 minutes and standard deviation of 6 minutes. Deshawn's time comes in at the 90th percentile. What percentage of the students are still working on their exams when Deshawn leaves?arrow_forwardSuppose that the weights of cereal boxes have a normal distribution with a mean of 20 ounces and standard deviation of half an ounce. A box that has a standard score of o weighs how much? syed by ilog ni 21arrow_forward
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