An investor is looking at the performance of a particular investment andthe information is provided in the table below :Periods Return %19.024.53.-6.24-5.62.510.67-6.981.54.6103.4Required:1. Calculate the mean.2. Calculate standard deviation using the table method.3. Construct a 99% confidence interval estimate of the populationmean return of the investment4. Do you think that the advisor has the right to state that theportfolio will reap a return of 8%5. Must you assume that the population of return is normallydistributed? Explain your answer[Hint : Answer to one decimal place]

Answered: Image /qna-images/answer/213610ae-752a-42cd-a064-41fb7283354e.jpg

Answered: An investor is looking at 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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Pulse Rates of Males Refer to Data Set 1 “Body Data” in Appendix B and use the pulse rates of males. a. Find the mean and standard deviation, and verify that the pulse rates have a distribution that is roughly normal. b. Treating the unrounded values of the mean and standard deviation as parameters, and assuming that male pulse rates are normally distributed, find the pulse rate separating the lowest 2.5% and the pulse rate separating the highest 2.5%. These values could be helpful when physicians try to determine whether pulse rates are significantly low or significantly high.
b) Find the mean and the standard deviation of the times in the following table. Because the table contains all the winning times for this race (up to year 2012), the data set is a population. Olympic Women's 400-Meter Dash Results, in Seconds, 1969-2012 52.0 51.08 49.29 48.88 48.83 48.65 48.83 48.25 49.11 49.41 49.62 49.55
Part 1 of 3 A researcher was investigating the size of math departments in Texas colleges. She believed the population standard deviation was 1.9. A sample of 42 colleges found their mean was 12.5. Find the 3-decimal small value of the 95% confidence interval of the mean. Part 2 of 3: Find the 3-decimal large value of the 95% confidence interval of the mean. Part 3 of 3: Find the 3-decimal margin of error
Expected return and standard deviation. Use the following information to answer the questions: a. What is the expected return of each asset? b. What is the variance of each asset? - X c. What is the standard deviation of each asset? Data Table swers you will type. Hint: Make sure to round all intermediate calculatio a. What is the expected return of asset A? (Click on the following icon in order to copy its contents into a spreadsheet.) (Round to four decimal places.) Return on Return on Return on Asset C in State State of Probability Asset A in Asset B in Economy of State State State Boom 0.34 0.05 0.21 0.27 Normal 0.45 0.05 0.06 0.21 Recession 0.21 0.05 -0.03 -0.22 | Print Done
View Policies Course Home Current Attempt in Progress ement-player/index.html?launchid=217a94cc-27e7-49b2-8eb7-8d034a1f25eb#/question Reading and Writing on the SAT Exam The Scholastic Aptitude Test (SAT) has two parts: Reading and Writing and Mathematics. Scores on both parts range from 200 to 800. The means and standard deviations for the two tests are shown in Table 1. Round your answer to the nearest integer. The estimated percentile for 705 is eTextbook and Media X WP NWP Assessment BX We see that scores on the Reading and Writing portion of the SAT (Scholastic Aptitude Test) exam are normally distributed with mean 531 and standard deviation 104. Use the normal distribution to answer the following questions. (a) What is the estimated percentile for a student who scores 705 on Reading and Writing? Round your answer to the nearest integer. The 30th percentile is the score of i eTextbook and Media Save for Later Mean St.Dev. Reading and Writing 531 104 528 117 Mathematics (b) What is…
[Statistics] What is the lower bound of the confidence interval?
Country of Origin N Mean Std. Deviation China 50 22.5 9.75 America 30 33.15 11.6 What is the SE mean for the sales from china? Calculate a 95% confidence interval for the mean sales amount made in America. Use the statistical tables when necessary and show all workings
A company that develops an automated customer service model is interested in knowing whether two versions, Version A and Version B, will get different ratings from customers. Participants in a focus group are taken through samples from both versions, then take a survey to rate each version. A summary of the data obtained from the study is given below. Assume ratings from the different surveys generally have the same standard deviation. Mean Observations Pearson Correlation Hypothesized Mean Difference df t Stat P(T<=t) one-tail t Critical one-tail P(T<=t) two-tail t Critical two-tail Confidence Level Version A Version B 33.133 28.67 15 15 -0.325 0.00 14 n = Ex: 9 -1.426 0.088 -1.345 0.176 -1.761 95% Degrees of freedom: df Point estimate for Version A: XA = Ex: 1.234 Point estimate for Version B: x B = 1 = من t = −1 Ex: 1.234 0 1 t = P = = Ex: 1.234 2 3 2
2. Find out (i) Mean (ii) Median and (iii) Standard Deviation for the following data. Class 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 Interval Frequency 15 18 22 28 32 26 25 17
The ages of undergraduate students at two universities (one in the east and one in the west) are being compared. Researchers want to know if there is a difference in the mean age of students at the two universities. The population standard deviations are known. The following data shows the results of samples collected at each institution: School Location n (sample size) sample mean ( ) population standard deviation West 33 25.78 6.29 East 35 23.16 7.52 What is the value of the test statistic for the previous problem? (Enter your answer as a positive value even if you calculated a negative test statistic value i.e. if you calculated -1.311 you should enter 1.311). Round your answer to 3 decimal places.
Which distribution do you use to find critical values for confidence intervals (n = 20) for a variancewhen the population standard deviation sigma is unknown?
Consider the following sample data. Sample A: 11, 22, 33 Sample B: 81, 92, 103 Sample C: 1,100; 1,111; 1,122 (a) Find the mean and standard deviation for each sample. Sample A: Sample B: Sample C: Mean Sample Standard Deviation (b) What does this exercise show about the standard deviation? multiple choice The idea is to illustrate that the standard deviation is not a function of the value of the mean. The idea is to illustrate that the standard deviation is a function of the value of the mean.

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