2. In 2015, the mean return of all common stocks on the Philippine Stock Exchange was 3.5%.The standard deviation of the returns was about 26%. A student of finance forms allpossible portfolios that invested equal amounts in 5 of these stocks and return for eachportfolio. This return is the average of the returns of the 5 stocks chosen. What are the meanand standard deviation of the portfolio returns? (Assume that the population is infinite ineach case).MARIA ROSEMARIE PIALDA and ENRIQUE C. Nicol Jr.AUTHORSTATISTICS AND PROBABILITYSUBJECT

Given : Mean return of all common stocks on the Philippines stock exchange was 3.5% The standard…

Answered: 2. In 2015, the mean return of all…

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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Americans (on average) individually eat 16 pounds of seafood each year with a standard deviation of 7 pounds. James samples 40 Americans and finds and average of 14 pounds. How likely is it to get an average of 14 pounds if he had a representative sample?
Suppose the returns of a particular group of mutual funds are normally distributed with a mean of 12.4% and a standard deviation of 4.7%. If the manager of a particular fund wants his fund to be in the top 5% of funds with the highest return, what return must his fund have? (please round your answer to 2 decimal places)
How would you find the standard deviation by hand, of the following numbers: 1,1,3,01,6,2
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Suppose that the annual rate of return for a common biotechnology stock is normally distributed with a mean of 4.5% and a standard deviation of 4%. Find the probability that the one-year return of this stock will be positive. Round your answer to at least four decimal places.
Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have BLUE eyes. Three randomly selected Americans are selected and examined for eye color. If you let success correspond to an American having BLUE eyes, calculate the following. Calculate the standard deviation.
a. Find the mean and the standard deviation of the number of these computers that will be returned for refunds. b. Find the mean and standard deviation of the total refund cost that will accrue as a result of these 60 purchases.
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An average of many different studies of handedness indicate that in a random sample of adults,14percent of men are left-handed and 6 percent of women are left-handed. (Assume the rest are right-handed.) Suppose you have a sample of 250 women and 100 men, in which the numbers of left-handed and right-handed people reflect the average percentages. Make a two-way table that shows the distribution you would find.
1. In 1955, Life Magazine reported that a 25-year-old mother of 3 children, worked an average of 80 hours each week. Recently, some researchers have been studying whether the women’s movement has resulted in an increase in the work week hours for women (combining employment and at-home work). A study was done to find out if the mean work week has, in fact, increased. A random sample of 81 women were surveyed and the mean was 83 hours with a standard deviation of 10. Using a 95% confidence level, does the sample data support the researcher’s claim that the average number of weekly hours that women work, is greater than 80? a. What statistical test will you use to test this data ? b. State the null and alternative hypothesis. i. H0: ii. Ha: c. What are the confidence intervals? d. What is the value of the test statistic? e. What is the p-value? f. Circle/highlight the correct decision about the null hypothesis. Reject H0…
Twelve percent of the world's population is left-handed. A researcher claims that left-handed individuals are more creative than those who aren't left- handed. In order to support his claim, he takes a sample of 1650 artists and finds that 14% of them are left-handed. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of p, where p is the proportion of left-handed individuals in a random sample of 1650. (b) Find the standard deviation of p. (c) Compute an approximation for P(p<0.14), which is the probability that there will be 14% or fewer left-handed people in a random sample of 1650. Round your answer to four decimal places.
The proportion of a in the tail of a gold distribution can be never be more than .50 true or false

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