Please help Rates of return (annualized) in two investment portfolios are compared over the last 12 quarters. They are considered similar in safety.but portfolio B is advertised as being "less volatile." (a) At a = .025, does the sample show that portfolio A has significantly greatervariance in rates of return than portfolio B? (b) At a = .025, is there a significant difference in the means?Portfolio APortfolio B5.279.108.697.7010.8312.474.106.585.667.548.667.137.707.659.727.669.668.734.828.9511.567.7311.469.97picture Click here for the Excel Data File(a-1) Choose the appropriate hypotheses. Assume o,2 is the variance of the Portfolio A and og is the variance of the Portfolio B.Ho: TA2i0g2 s1 versus H: 0A2i0g2>1Ho: TA-i0B = 1 versus H: OA2/0B2 #1Ho: TA-I0B21 versus H: OA2iog?<1(0-2) Specify the decision rule. (Round your answer to 2 declmal places.)Reject the null hypothesis if Fcale >(a-3) Calculate the test statistic Fealc- (Round your answer to 2 decimal places.)Feale (a-4) What is your conclusion?We (Click to select)the null hypothesis.(b-1) Choose the appropriate hypotheses. Assume d= company assessed value - employee assessed value.Ho: M1 - 2 =0 vs. H: 1 – P2#0Ho: M1- U220 vs. Hi: My – H2<0O Ho: 1 - 2 s0 vs. H: M1 - 12>0(b-2) State the decision rule for 0.025 level of significance. (Use the qulck rule for the degree of freedom. Round your answers to 3decimal places. A negative value should be Indicated by a minus sign.)Reject the null hypothesis if tcale| or tcalc>[(b-3) Find the test statistic tealc- (Round your answer to 2 declmal places.)tcale(b-4) What is your conclusion?WeL(Click to select) Vthe null hypothesis.

Solution: Given information: n1= 12 Sample size of An2= 12 Sample size of B x1= 8.4925 Sample…

Answered: Rates of return (annualized) in two…

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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Past records from a local hospital stated that the proportion of full-term babies born in the hospital who weigh less than seven pounds is 43%. Suppose that we have strong reason to believe the proportion is greater than 43%, and we wish to carry out a hypothesis test. State the null hypothesis H0 and the alternative hypothesis H1 that we would use for this test. H0: H1:
You accept the alternative hypothesis when you reject the null hypothesis. justify the above statement?
A physician wants to test two blood glucose meters to see if there is any differences in measurements. To do this, he measures the glucose in blood samples taken from several randomly selected patients with both meters. Identify the null and alternative hypotheses for a hypothesis test, where each difference is calculated by subtracting the measurement on the second meter from the measurement on the first meter. A. H0:μd=0 Ha:μd>0 B. H0:μd=0 Ha:μd≠0 C. H0:μd=0 Ha:μd<0 D. H0:μd≠0 Ha:μd=0
p </= alpha A) reject the null hypothesis B) accept the null hypotheses
You may need to use the appropriate technology to answer this question. Suppose a certain state university's college of business obtained the following results on the salaries of a recent graduating class: Finance Majors Business Analytics Majors n1 = 140 n2 = 30 x1 = $48,337 x2 = $55,217 s1 = $19,000 s2 = $10,000 (a) Formulate hypotheses so that, if the null hypothesis is rejected, we can conclude that salaries for Finance majors are significantly lower than the salaries of Business Analytics majors. Use ? = 0.05. (Let ?1 = the population mean salary for Finance majors, and let ?2 = the population mean salary for Business Analytics majors. Enter != for ≠ as needed.) H0: Ha: (b) What is the value of the test statistic? (Use ?1 − ?2. Round your answer to three decimal places.) (c) What is the p-value? (Round your answer to four decimal places.) p-value = (d) What is your conclusion? Do not reject H0. We cannot conclude that…
You may need to use the appropriate technology to answer this question. Suppose a certain state university's college of business obtained the following results on the salaries of a recent graduating class: Finance Majors Business Analytics Majors n1 = 120 n2 = 30 x1 = $48,237 x2 = $55,217 s1 = $19,000 s2 = $10,000 (a) Formulate hypotheses so that, if the null hypothesis is rejected, we can conclude that salaries for Finance majors are significantly lower than the salaries of Business Analytics majors. Use ? = 0.05. (Let ?1 = the population mean salary for Finance majors, and let ?2 = the population mean salary for Business Analytics majors. Enter != for ≠ as needed.) H0: Ha: (b) What is the value of the test statistic? (Use ?1 − ?2. Round your answer to three decimal places.) (c) What is the p-value? (Round your answer to four decimal places.) p-value = (d) What is your conclusion? Do not reject H0. We cannot conclude that salaries…
you have been hired by the San Antonio Spurs to analyze the 2005-2006 season. DRB - Number of Defensive Rebounds ORB – Number of Offensive Rebounds 3P – 3 point Field Goals Made Spurs- DRB- 2548 ORB- 851 3P- 524 Create a Null Hypothesis and Alternative Hypothesis based on the data above. The Hypothesis must be in written form and formula form. Show the Cluster sample
A. Express the null hypothesis H0 and the alternative hypothesis Ha in notation form in the following scenarios. 1. The mean annual income of workers who are college graduates is greater than Php100,000 a year. 2. The percentage of women who watches sports on TV is not 40% as claimed by a researcher. 3. A random sample of 60 working students was taken in order to determine whether the average age of working students is different from 19 years.
When is a researcher at risk of making a Type II error? a. whenever H1 is rejected b. whenever H0 fails to be rejected c. whenever H0 is rejected d. The risk of a Type II error is independent of the decision from a hypothesis test.
When is a researcher at risk of making a Type II error? a. whenever H0 is rejected b. whenever H1 is rejected c. whenever H0 fails to be rejected d. The risk of a Type II error is independent of the decision from a hypothesis test.
If the null hypothesis is h = h0 (here h denotes the population parameter of interest.) and the alternate hypothesis is h > h0 then we perform a two-tail hypothesis testing. True or False
A paint manufacturer advertises that one gallon of its paint will cover 400 square feet of an interior wall. Some local painters suspect the average coverage is considerably less and decide to conduct an experiment to find out. Which of the following are the correct null and alternative hypotheses to be tested? A construction company has a bid on two large construction projects. The president believes that the chances of winning the first contract is 55% and the chances of winning the second contract is 30% and that winning either contract is independent of winning the other. What are the chances the company will not win either contract? Spelling mistakes in a text are either “nonword errors” or “word errors.” A nonword error produces a string of letters that is not a word, such as “the” typed as “teh.” Word errors produce the wrong word, such as “loose” typed as “lose.” Nonword errors make up 25% of all errors. A human proofreader will catch 80% of nonword errors and 50% of…

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