1. Conduct a two-sample t-test at a 1% level of significance to find out if the U.S. stock returns significantly outperform the U.S. corporate bond returns using the monthly data covering the sample period 1980-2019.I don't understand why my observation(sample n =479) and df= 660 on the summary output, please explain if anything is possibly put wrong...... t-Test: Two-Sample Assuming Unequal VariancesRSUSRBUSMean1.0146999220.690161516Variance18.232496413.607841104Observations479479Hypothesized Mean Differencedf660t Stat1.519862092P(T<=t) one-tailt Critical one-tailP(T<=t) two-tailt Critical two-tail0.0645122652.3320111410.129024532.583298942

The formula for degrees of freedom is df=S12n1+S22n22S12n12n1-1+S22n22n2-1.From the given data RSUS:S12≈18.232n1=479RBUS:S22≈3.608n2=479 As the output is from two samples assuming unequal variances. For this, df=S12n1+S22n22S12n12n1-1+S22n22n2-1 =18.232479+3.608479218.324792479-1+3.6084792479-1 ≈660∴ df is correct

Math

Statistics

1. Conduct a two-sample t-test at a 1% level of significance to find out if the U.S. stock returns significantly outperform the U.S. corporate bond returns using the monthly data covering the sample period 1980-2019. I don't understand why my observation(sample n =479) and df= 660 on the summary output, please explain if anything is possibly put wrong......

1. Conduct a two-sample t-test at a 1% level of significance to find out if the U.S. stock returns significantly outperform the U.S. corporate bond returns using the monthly data covering the sample period 1980-2019. I don't understand why my observation(sample n =479) and df= 660 on the summary output, please explain if anything is possibly put wrong......

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

Suppose the math department chair at a large state university wants to estimate the average overall rating, out of five points, that students taking Introductory Statistics gave their lecturers on their end-of-term evaluations. She selects a random sample of 40 evaluations and records the summary statistics shown. Sample size Sample mean Sample standard deviation Population standard deviation Standard error Confidence level ? ?⎯⎯⎯ ? ? ??⎯⎯⎯⎯ ? 40 3.8303 1.0112 1.0750 0.1700 95% The department chair determines the standard error using ?, the standard deviation calculated from all student evaluations submitted to her department. Assume the Statistics lecturers' ratings have the same standard deviation. Use this information to find the margin of error and the lower and upper bounds of a 95% confidence interval for ?, the mean overall rating students gave their Introductory Statistics lecturers. Round your answers to the nearest hundredth.
5. Consider the partially completed ANOVA summary table below. Source df SS MS Regression 1 700 Residual Total 8 1100 a. Complete the remaining entries in the table. b. Calculate the sample coefficient of determination. C. Using a=0.05, is there a significant relationship between two variables?
The following table shows data on the annual rates of return from five stocks listed on NYSE and NASDAQ. Assume the populations SDs are similar, but unknown. At the 0.10 significance level, can we conclude that the annual rates of return are higher for NYSE? NYSE (Big Board) NASDAQ 15 8.8 10.7 6 20.2 14.4 18.6 19.1 19.1 17.6 8.7 17.8 17.8 15.9 13.8 17.9 22.7 21.6 14 6 26.1 11.9 23.4
Question Help The following contingency table shows opinion about global warming (nonissue vs. serious concern) among registered voters, broken down by political party affiliation (Democratic, Republican, and Independent). Use the table to answer a) through c) below. Opinions on Global Warming Nonissue Serious Concern Total 80 Democratic Political Party Republican Independent Total 420 500 300 200 500 100 100 200 480 720 1200 a) What is the probability that a randomly selected registered voter who is a Republican believes that global warming is a serious issue? (Round to three decimal places as needed.)
1. According to the records of an auto insurance company, the average distance that their customers drive to work is 17.4 miles. You are a new agent, and you think this is too low. You do a random polling of 50 of the company's customers, and you find that the average is 18.5 miles with a standard deviation of 3.4 miles. Do these data provide enough evidence at the 0.05 level of significance to conclude that the average distance driven to work is actually more than 17.4 miles? A. State the null and alternative hypotheses B. State the p-value. C. What is your conclusion about the null hypothesis? D. What is your conclusion in context of this problem?
State the conclusion based on the results of the test. According to the Federal Housing Finance Board, the mean price of a single-family home two years ago was $299,100. A real estate broker believes that because of the recent credit crunch, the mean price has increased since then. The null hypothesis is not rejected. Choose the correct answer below. O A. There is not sufficient evidence to conclude that the mean price of a single-family home has increased from its level two years ago of $299,100. O B. There is sufficient evidence to conclude that the mean price of a single-family home has decreased from its level two years ago of $299,100. C. There is sufficient evidence to conclude that the mean price of a single-family home has increased from its level two years ago of $299,100. O D. There is not sufficient evidence to conclude that the mean price of a single-family home has decreased from its level two years ago of $299,100.
5)