Chapter 08, Section 8.3, Problem 041Almost all employees working for financial companies in New York City receive large bonuses at the end of the year. A sample of 63 employees selected from financial companies in New York Cityshowed that they received an average bonus of $60,000 last year with a standard deviation of $20,000. Construct a 95% confidence interval for the average bonus that all employees working forfinancial companies in New York City received. last year.Round your answers to cents.%24to $Question Attempts: 0 of 2 usedSAVE FOR LATERSUBMIT ANSWERpowered byMapleNetoniontion5bction19ection022Version 4.24.20.1ent Privacy Policy I2000-2020 John Wiley & Sons, Inc. All Rights Reserved. A Division of John Wiley & Sons, Inc.MacBook AirDIIDDF9F1011F12F1F2F3F4F5F6F7FB@2$&*8.9dele%3D46.7# 3

Given Observation Sample size(n) = 63 Sample mean = $60,000 Sample standard deviation = $20,000…

Chapter 08, Section 8.3, Problem 041 Almost all employees working for financial companies in New York City receive large bonuses at the end of the year. A sample of 63 employees selected from financial companies in New York City showed that they received an average bonus of $60,000 last year with a standard deviation of $20,000. Construct a 95% confidence interval for the average bonus that all emplovees working for financial companies in New York City received.last year. Round your answers to cents. to $ SAVE FOR LATER SUBMIT ANSWER Question Attempts: 0 of 2 used

Chapter 08, Section 8.3, Problem 041 Almost all employees working for financial companies in New York City receive large bonuses at the end of the year. A sample of 63 employees selected from financial companies in New York City showed that they received an average bonus of $60,000 last year with a standard deviation of $20,000. Construct a 95% confidence interval for the average bonus that all emplovees working for financial companies in New York City received.last year. Round your answers to cents. to $ SAVE FOR LATER SUBMIT ANSWER Question Attempts: 0 of 2 used

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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Question 1. Suppose that a committee is studying whether or not there is waste of time in our judicial system. It is interested in the average amount of time individuals waste at the courthouse waiting to be called for service. The committee randomly surveyed 81 people. The sample average was 8 hours with a sample standard deviation of 4 hours. (a) Construct a 95% confidence interval for the population average time wasted and write the interpretation (Sketch the graph). (b) Which distribution you used for this problem? Explain your choice.
Question 4: compute a 95% confidence interval for the average sleep of all college students.
QUESTION 13 You are interested in seeing whether emotions impact decision making. You have three groups--a happy group, a sad group, and a neutral group. For the happy group there are 5 participants and the mean risky decision making score 5.0 with a standard deviation of 0.7. For the sad group there are 5 participants and the mean risky decision making score 5.4 with a standard deviation of 1.1. For the neutral group there are 5 participants and the mean risky decision making score 5.8 with a standard deviation of 2.8. The sum of squares between samples is equal to 1.6. The sum of squares within samples is equal to 38.0. You calculated the f-ratio above. The corresponding p-value for the f-ratio you calculated is p = 0.78. Do you accept or reject the null hypothesis? O You accept the null hypothesis because your p-value is greater than .05 and not significant. O You reject the null hypothesis because your p-value is greater than .05 and significant. O You accept the null hypothesis…
Question 3 a,b,c,d
Question three John and his friend were recently having a heated discussion about the number of men living in a western parish who possibly cared for children that are not biologically theirs during 2019. Assume that a survey of the parish’s population revealed that the average number of cases and the standard deviation was 5,000 and 6000 in 2019, respectively. John and his friend do not believe that the population average is correct. Assume that a survey based on a sample of the 800 people was conducted and found that the average number of cases in the western parish was 10,000 over the 12 months period. Conduct a hypothesis test, using a 5% significance level to determine if the average number of cases is actually higher based on the sample data.
10. In a study conducted to determine the role that sleep disorders play in academic performance, researcher Jane Gaultney conducted a survey of 503 randomly selected students with a known sleep disorder (such as narcolepsy, insomnia, or restless leg syndrome) and found their mean GPA was 2.65 with a standard deviation of 0.87. Similarly, she randomly selected 1342 students with no known sleep disorders, and found their mean GPA to be 2.82 with a standard deviation of 0.83. You may assume that both population GPA's are normally distributed. Use a significance level of 0.05 to test whether the two groups have different mean GPA's. As a follow-up, construct and interpret a 95% confidence interval for the true difference in the mean GPA's of the two groups. What would be the type I and type II errors for this problem?
part 3 4 The number of clients arriving at a bank machine is Poisson distributed with an average of 2 per minute. For a 5-minute period, Find the expected value and standard deviation. What is the probability that 2 customers will arrive in a 5-minute period? What is the probability that no more than 2 customers will arrive in a 5-minute period? What are the underlying assumptions that allow us to consider this phenomenon as a Poisson distribution?
4. According to a 2019 Federal Reserve report, 54% of U.S. young adults who went to college took on some debt for their education. Suppose we take a random sample of 400 U.S. young adults who went to college and took on some debt, a) Find the mean and standard of the sampling distribution of ?̂. mean= ?? = standard deviation of the sample proportion, ?? = b) Determine the probability that more than 60% of the persons in the sample took on some debt.
A pension fund manager is considering three mutual funds. The first is a stock fund, the second is a long-term bond fund, and the third is a money market fund that provides a safe return of 8%. The characteristics of the risky funds are as follows: The correlation between the fund returns is 0.12. a-1. What are the investment proportions in the minimu variance portfolio of the two risky funds? a-2 What are the expected value and standard deviation of the minimum variance portfolio rate of retrurn?
Chapter 8. 5) A random sample of 43 Foreign Language movies made since 2000 had a mean length of 112.5 minutes, with a standard deviation of 12.6 minutes. (a) Construct a 95% confidence interval for the true mean length of all Foreign Language movies made since 2000 (b) As of November 2010, three Spider-Man movies have been released, and their mean length is 129 minutes. Someone claims that the mean length of Spider-Man movies is actually less than the mean length of all Foreign Language movies. Does the confidence interval contradict this claim? 6
QUESTION 11 Provide an appropriate response. A local bank needs information concerning the savings account balances of its customers. A random sample of 15 accounts was checked. The mean balance was $686.75 with a standard deviation of $256.20. Find a 98% confidence interval for the true mean. Assume that the account balances are normally distributed. Round to the nearest cent. ($487.31, $563.80) ($513.17, $860.33) O ($326.21, $437.90) O($238.23, $326.41)