Do bonds reduce the overall risk of an investment portfolio? Let x be a random variable representing annual percent return forVanguard Total Stock Index (all stocks), Let y be a random variable representing annual return for Vanguard Balanced Index (50%stock and 40% bond). For the past several years, we have the following data.LAUSE SALT(a) ComputexComputeCompute100 37 23 32 22 26 -13-9-208 -2 28 16 23 19 16Compute²-3-11(b) Use the results of part (a) to compute the sample mean, variance, and standard deviation for x. (Round your answers tofour decimal places)Use the results of part (a) to compute the sample mean variance, and standard deviation for y. (Round your answers tofour decimal places)(6) Computea 75% Chebyshev interval around the mean for values. (Enter your answer in the form lower it to upperSmit. Include the word "to" Round your numerical values to tere decimal places)Comune a 75% Chebyshev interval around the mean for y values. (Enter your answer is the form lower amt to uppermit Include the word "to" Round your numerical values to two decimal places) (0) Computea 75% Chebyshev interval around the mean for values. (Enter your answer in the form: lower limit to uppersest. Include the word "t" Round your numerical values to two decimal places.Computea 75% Chebyshev interval around the mean for y values. (Enter your answer in the form: lower limit to upperame. Include the word "to" Round your numerical values to two decimal places)Use the intervals to compare the two funds75% of the returns for the balanced fund fall within a narrower range than those of the stock fund75% of the returns for the stock fund fall within a narrower range than those of the balanced fund25% of the returns for the balanced fund fall within a narrower range than those of the stock fund.25% of the returns for the stock fund fall within a wider range than those of the balanced fund(d) Compute the coefficient of variation in percent) for fund x. (Round your answer to the nearest whole number)Compute the coefficient of variation (in percent) for fund y. (Round your answer to the nearest whole number)Use the coefficients of variation to compare the two fundsFor each unit of retum, the stock fund has lower riskfor each unit of return, the balanced fund has lower risk.For each unit of return, the funds have equal riskIf a represents risks and represents expected return, then a can be thought of as a measure of risk per unit of expectedretum. In this case, why is a smaller CV better? Explain.A smaller CV is better because it indicates a higher risk per unit of expected returnA smaller CV is better because it indicates a lower risk per unit of expected retur

by bartleby policy i can gives only 3 subparts answers at time From given data we have : x 10 0…

Answered: (a) Computex Compute Compute Ty Compute…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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There are four numbers in a data set. They are 3, 5, 8, and 13. a) What is the 2 (Σ- b) What is the c) The formula for the sample variance, S is Use parts a and b 1. to help calculate the variance. d. Now take the square root of the previous answer to get the sample standard deviation.
The second picture is the minitab outcome as asked to be used in the question.
1-> O Researchers conducted a study to determine whether magnets are effective in treating back pain. The results are shown in the table for the treatment (with magnets) group and the sham (or placebo) group. The results are a measure of reduction in back pain. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. treatment Is it valid to argue that magnets might appear to be effective if the sample sizes are larger? for those treated with magnets is the sample mean for those given a sham treatment, it <1-₂ (Round to three decimal places as needed.). Since the be effective if the sample sizes are larger. b. Construct a confidence interval suitable for testing the claim that those treated with magnets have a greater mean reduction in pain than those given a sham treatment. Treatment 1₁ n 24 X 0.54 s 0.74 Sham 11/2 24 0.44 1.33…
8
2. Which test calculates the standard deviation of the difference as part of its computational formula? * Chi-Square test Unpooled Variance t-test Mann-Whitney U test Pooled Variance t-test
which of the following excel functions would you use to answer this question "Is the number if applications accepted for public colleges/universities the same as for private colleges/universities?" Options: 1) t-test: paired two sample for means 2) t-test: two sample assuming equal variances 3) t-test: two sample assumung unequal variances 4) z-test: two sample for means
Compute the Variance and standard deviation of the given table 4d?Class Intervals1-1011-2021-3031-4041-5051-6061-70Frequency45612119Table 4d
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Students in Mr Brawn's exercise class have to do press-ups and sit-ups. The number of press-ups x and the number of sit-ups y done by a random sample of 8 students are summarised below. Σχy = 11 222, Σε = 272, Σy = 320, Σχ" = 10 164, Σy = 13 464. The addition of the mean and standard deviation of the number of press-ups done by these students, is (A) 44 (B) 44.07 (C) 44.70 (D)None of these * Q3
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(a) Computex Compute Compute Ty Compute ² (8) Use the results of part (a) to compute the sample mean variance, and standard deviation for Round your answers to i-