Murtaza wants to verify that the monthly returns of the fund that he manages has astandard deviation equal to 25% based on estimates collected between 2000 and 2019over 19 years To verify this, Murtaza collected monthly returns for an eleven-monthperiod between 2019 and 2020 and measured a standard deviation of monthly returns of26.8%. Murtaza calculates a test statistic of 4.28. Using a 10% significance level,determine if the more recent standard deviation is ditfferent from the standard deviation ofthe 2000-2019 period.Which of the following assertions is MOST CORRECT:O The two critical values are 939 and 28.869 and you reect the ml bypothesisThe two critical values an 194 and 18307 and you tail to reject the null bypothesisThe two critical values are 3247 and 20 483 and you fail to reject the null hypothesis.The null hypothesis is that the varlance population is equal to 25XO The two-critical values are 4865 and 15.987 and you reject the null fypothesis

Name: Murtaza wants to verify that the monthly returns of the fund that he
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: Murtaza wants to verify that the monthly returns of the fund that he manages has astandard deviation equal to 25% based on estimates collected between 2000 and 2019over 19 years To verify this, Murtaza collected monthly returns for an eleven-monthpe

Given n=19, s=0.25, sigma=0.268 Statistic=X2= chi square=4.28 alpha=0.10 Chi square critical are…

Math

Statistics

Murtaza wants to verify that the monthly returns of the fund that he manages has a standard deviation equal to 25% based on estimates collected between 2000 and 2019 over 19 years. To verify this, Murtaza collected monthly returns for an eleven-month period between 2019 and 2020 and measured a standard deviation of monthly returns of 26.8% Murtaza calculates a test statistic of 4.28. Using a 10% significance level, determine if the more recent standard deviation is ditferent from the standard deviation of the 2000-2019 period. Which of the following assertions is MOST CORRECT: O The two critical values are 939 and 28.869 and vou reject the mul bypothesis O The two critical values ane194 and 18307 and you tail to reject the null hypothesis The two critical values are 3.247and 20483 and you fail to reject the null hypothesis The null hypothesis is that the varlance popukation is equal to 25% O The two critical values are 4.865 and 15.987 and you eject the nul fypothesis

Murtaza wants to verify that the monthly returns of the fund that he manages has a standard deviation equal to 25% based on estimates collected between 2000 and 2019 over 19 years. To verify this, Murtaza collected monthly returns for an eleven-month period between 2019 and 2020 and measured a standard deviation of monthly returns of 26.8% Murtaza calculates a test statistic of 4.28. Using a 10% significance level, determine if the more recent standard deviation is ditferent from the standard deviation of the 2000-2019 period. Which of the following assertions is MOST CORRECT: O The two critical values are 939 and 28.869 and vou reject the mul bypothesis O The two critical values ane194 and 18307 and you tail to reject the null hypothesis The two critical values are 3.247and 20483 and you fail to reject the null hypothesis The null hypothesis is that the varlance popukation is equal to 25% O The two critical values are 4.865 and 15.987 and you eject the nul fypothesis

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The shelf life of a battery produced by one major company is known to be Normally distributed, with a mean life of 3.5 years and a standard deviation of 0.75 years. What is the upper quartile of battery shelf life? Use the fact that the middle 50% of the data falls within 0.67 standard deviations from the mean.
Suppose that a recent article stated the mean time spent in jail by a first-time convicted burglar is 2.7 years. A study was then done to see if the mean time has increased in the new century. A random sample of 27 first-time convicted burglars in a recent year was picked. The mean length of time in jail from the survey was 3.01 with a standard deviation of 1.78 years. Assume that the distribution of jail times is approximately normal. Test the claim at the level of significance 0.1. Select one: a) t_stat = 0.9 and t_cr = 1.31 : The mean time increased significantly in the new century b) t_stat = 0.9 and t_cr = 1.31 : The mean time didn’t increase in the new century c) t_stat = 0.99 and t_cr = 1.71 : The mean time didn’t increase in the new century d) t_stat = 0.99 and t_cr = 1.71 : The mean time increased significantly in the new century
A study of Brown Bag Company's payment practices showed that the company pays its vendors 20 days after the accounting department receives the invoice. The standard deviation is 5 days. Assuming that there is a normal distribution across the company's payments, what percent of the invoices are paid within 15 days of receiving them? Based on your answer, recommend an effective payment strategy for the company.
You want to estimate the mean amount of time Internet users spend on Facebook each month. How many Internet users must be surveyed in order to be 90% confident that your sample mean is within 10 minutes of the population mean? Based on results from a prior survey, assume that the standard deviation of the population of monthly times spent on Facebook is 210 minutes.
You have obtained the number of years of education from one random sample of 38 police officers from City A and the number of years of education from a second random sample of 30 police officers from City B. The average years of education for the sample from City A is 15 years with a standard deviation of 2 years. The average years of education for the sample from City B is 14 years with a standard deviation of 2.5 years. Is there a statistically significant difference between the education levels of police officers in City A and City B?What is the appropriate test for this case? 2 sample z-testChi-square test 2-sample t-test2 sample paired t-test Carry out the test. The test statistic = (round answer to two decimal places.)and the p-value is (round answer to 2 decimal places)There sufficient evidence at the 5% level to conclude that the education levels of police officers in City A and City B is significantly different.
Identify the formula for the margin of error for the estimate of a population mean when the population standard deviation is unknown.
In what percentile is an infant’s body weight of 7 pounds, if infant body weights at that age are normally distributed with mean 11 pounds, and standard deviation 2 pounds?
In a school district, all sixth grade students take the same standardized test. The superintendant of the school district takes a random sample of 3030 scores from all of the students who took the test. She sees that the mean score is 169169 with a standard deviation of 7.06747.0674. The superintendant wants to know if the standard deviation has changed this year. Previously, the population standard deviation was 1313. Is there evidence that the standard deviation of test scores has decreased at the α=0.005α=0.005 level? Assume the population is normally distributed. Step 1 of 5: State the null and alternative hypotheses. Round to four decimal places when necessary. Step 2 of 5: Determine the critical value(s) of the test statistic. If the test is two-tailed, separate the values with a comma. Round your answer to three decimal places. Step 3 of 5: Determine the value of the test statistic. Round your answer to three decimal places. Step 4 of 5: Make the…
Suppose that the quarterly sales levels among health care information systems companies are approximately normally distributed with a mean of 8 million dollars and a standard deviation of 1.3 million dollars. One health care information systems company considers a quarter a "failure" if its sales level that quarter is in the bottom 10% of all quarterly sales levels. Determine the sales level (in millions of dollars) that is the cutoff between quarters that are considered "failures" by that company and quarters that are not. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place. 00 0 million dollars X S ? Check acer Q tab esc ! 1 9. a @ 2 W →> S #m 3 X e C d $ LAS 4 C r % 5 f t > < 6 g y & JX b 7 h C n K1300
I wanted to do a market research study estimating the average hourly wage earned by childcare workers in the bay area. How large does my sample need to be in order to have a margin of error that is less than $0.50 with a 95% confidence in the result. Assume that the standard deviation of the wages is $2 per hour.
According to Current Population Reports, the population distribution of number of years of education for self-employed individuals in the United States has a mean of 13.6 and a standard deviation of 3.0. Find the mean and standard error of the sampling distribution of ȳ for a random sample of 9 residents.
During the busy season, it is important for the shipping manager at ShipMundo to be able to estimate the time it takes the loading crew to load a truck. The shipping manager has found that she can model the load times using a normal distribution with a mean of 152 minutes and a standard deviation of 15 minutes. Use this table or the ALEKS calculator to find the percentage of load times between 116 minutes and 149 minutes according to the model. For your intermediate computations, use four or more decimal places. Give your final answer to two decimal places (for example 98.23%).