mnomy use the standard deviation of the monthly percentage return for amutual fund as a measure of the risk for the fund; in such cases, a fund that has a largerstandard deviation is considered more risky than a fund with a lower standard deviation.The standard deviation for the American Century Equity Growth fund and the standarddeviation for the Fidelity Growth Discovery fund were recently reported to be 15.0% and18.9%, respectively. Assume that each of these standard deviations is based on a sample of60 months of returns. Do the sample results support the conclusion that the Fidelity fund hasa larger population variance than the American Century fund? Which fund is more risky?(17. ) Most individuals are aware of the fact that the average annual repair cost for an auto-mobile depends on the age of the automobile. A researcher is interested in finding outwhether the variance of the annual repair costs also increases with the age of the auto-mobile. A sample of 26 automobiles 4 years old showed a sample standard deviation forannual repair costs of $170 and astandard deviation for annual repair costs of $100.State the null and alternative versions of the research hypothesis that the variance inannual repair costs is larger for the older automobiles.b. At a .01 level of significance, what is your conclusion? What is the p-value? Discussthe reasonableness of your findings.ple of 25 automobiles 2 years old showed a samplea.18. Data were collected on the top 1000 financial advisers by Barron's. Merrill Lynch had239 people on the list and Morgan Stanley had 121 people on the list. A sample of 16 ofthe Merrill Lynch advisers and 10 of the Morgan Stanley advisers showed that the advis-ers managed many very large accounts with a large variance in the total amount of fundsmanaged. The standard deviation of the amount managed by the Merrill Lynch advisers$587 million. The standard deviation of the amount managed by the Morgan.was S1%3Ddetermine

17) Answer:----. Date:----3/10/2021

Answered: 17. ) Most individuals are aware of the…

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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Example: Home mortgage interest rates for 30-year fixed rate loans vary throughout the country. During the summer of 2000, data available from various parts of the country suggested that the standard deviation of the interest rates was .096. The corresponding variance in interest rates would be (096) =.009216. Consider a follow up study in the summer of 2005. The interest rates for 30 year fixed rate loans at a sample of20 lending institutions had a sample standard deviation of .114. Conduct a hypothesis test using H:o = .009216 to see whether the sample data indicate that the variability in interest rates changed. Use a = .05. What is your conclusion?
1)The analysis of the results of budget survey of 150 families gave an average monthly expenditure of $ 120 on food items with a standard deviation of $15. After the analysis was completed it was noted that figure recorded for one house-hold was wrongly taken as $15 instead of $ 105. Determine the correct value of the average expenditure and its standard deviation.
1
The grade point average of the students at university A is 2.80 with a standard deviation of 1.092. The grade point average of students at university B is 2.4 with a standard deviation of 0.96. Which university shows a more dispersed grade distribution? The coefficient of variation for university A is ______%, while the coefficient of variation for university B is _________ %. Therefore, the ages in (A OR B?) show a more dispersed distribution.
An article in Knee Surgery Sports Traumatology, Arthroscopy, "Effect of provider volume on resource utilization for surgical procedures," (2005, Vol. 13, pp. 273-279) showed a mean time of 116 minutes and a standard deviation of 18 minutes for ACL reconstruction surgery for high-volume hospitals (with more than 300 such surgeries per year). If a high-volume hospital needs to schedule 10 surgeries, what is the mean and variance of the total time to complete these surgeries? Assume the times of the surgeries are independent and normally distributed. Mean = i Variance = i minutes minutes²
A brokerage firm wants to conduct a study to see if there is a linear relationship between the size of an account and the number of trades conducted each year. What would be the most appropriate procedure to use to analyze data to answer this question? Only choose a test that handles multiple comparisons if such a test is needed. O ANOVA (Analysis of Variance) O Regression Test of Slope or Correlation O Test for a Difference of Proportions O Chi-square test of association O Test for a Difference of Means
A study shows that Michigan teachers have measures of job dissatisfaction that are normally distributed with a mean of 3.80 and standard deviation of 0.95. If subjects with scores above 4.0 are to be given more tests, what percentage will fall into that category?
A report stated that after obtaining a bachelor's degree, 43% of college students enroll in a graduate degree program. For a random sample of 61 undergraduate students, find the mean, variance and standard deviation for the number of students who will enroll in a graduate degree program after obtaining a bachelor's degree. a.) mean b.) variance c.) standard deviation (round to two decimal places)
4. The cost of a daily newspaper varies from city to city. However, the variation among prices remains steady with a standard deviation of 18¢. A study was done to test the claim that the mean cost of a daily newspaper is $1.00. Twelve costs yield a mean cost of 93¢ with a standard deviation of 17¢. Do the data support the claim at the 1% level?
Given that the researcher wants to be sure the mean difference in the change in hemoglobin levels has a margin of error no more than 0.2 g/dL and the difference in the stand deviation between the mean hemoglobin levels for the two forms of iron supplements used to treat anemia is 1.2 g/dL, what is the desired number of recruits for the study, assuming the individuals will participate in a crossover trial, if the study’s attrition rate is expected to be .25? Group of answer choices n= 139 n= 186 n= 554 n= 55,320

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