Test the Variances.Assume both populations are normally distributedHo:o = oHA:o + o (Claim)|3|s = 11, s = 6.4n1 =7, n2 = 13%3Da = 0.10Two Sample F-Test for VarianceDegrees of Freedom(Denominator)F-Test StatisticDegrees of Freedom(Numerator)df = n-1dfp = n2-1F =Where si > sRound all values to 3 decimal placesa. The Critical Value Fo%3Db. The Test Statistic F =Conclurion

Answered: Test the Variances.Assume both…

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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Noise pollution is measured in decibels. In California any motorcycle made after 1980 may not be any louder than 80 decibels. Harley Davidson claims their mean decibel rating on bikes is 70 with a variance of 10. The variance of the noise is questioned. Just because Harley has a mean that is less than 80, they could still be producing louder than acceptable bikes. The federal EPA conducts a sample of 30 bikes and determines the variance to be 20 decibels. Is there enough evidence to question Harley’s claim of 10 decibels?
can you please provide explanations
How to find the simple variance & standard Deviation. Show the work for the simple variance mean: 52.1 range: 64 mode: 41.0 & 49.0
Are yields for organic farming different from conventional farming yields? Independent random samples from method A (organic farming) and method B (conventional farming) gave the following information about yield of lima beans (in tons/acre). (Reference: Agricultural Statistics, United States Department of Agriculture.) Method A 1.30 1.87 1.29 1.68 1.36 1.12 1.60 1.92 1.13 1.27 1.73 Method B 1.71 1.62 2.31 1.89 1.34 2.25 2.12 1.45 1.46 1.97 1.74 1.18 Use a 1% level of significance to test the hypothesis that there is no difference between the yield distributions. (a) What is the level of significance? (b) Compute the sample test statistic. (Use 2 decimal places.) (c) Find the P-value of the sample test statistic. (Use 4 decimal places.)
Find the variance and standard deviation
Which would be the appropriate way to test differences in proportions for more than two samples? t-test if variance is unknown z-test paired t-test F-test for equality of variances cross-tabulation procedure to conduct a chi-square test
People spend huge sums of money for the purchase of magnets used to treat a wide variety of pains. Researchers conducted a study to determine whether magnets are effective in treating back pain. Pain was measured using the visual analog scale, and the results given below are among the results obtained in the study. Assume that population variances are equal and unknown, use a = 0.05 to test the claim that those treated with magnets have a greater reduction in pain than those given a sham treatment. Find the value of the statistic. Reduction in sample sample sample pain level after magnet treatment size mean std. dev. nį = 20 | ī = 0.49 n2 = 20 | ã2 = 0.44 S1 = 0.96 S2 = 1.4 after sham treatment
A researcher is interested whether a new drug is effective in changing patients' cholesterol levels. She divided 33 patients into 3 groups according to the dosage the patient received. The cholesterol levels of all patients are measured and used as the data for the Analysis of Variance (ANOVA). If she reported the test statistic F = 2.1 What is the degree of freedom for the numerator of the F statistic? What is the degree of freedom for the denominator of the F statistic? What is the P-value of the F-test? (Round to 3 decimals) Given the significance level of 0.01, what can she conclude from the test? *The patients in differnt groups have simliar average cholesterial levels. The drug made no difference. *At least one group of patients have an average cholesterol level that is different from the other groups. The drug may have an effect.
Suppose Y = 6x-8, where x is a random variable with mean 2 and a variance of 4/3. Determine the variance of the random variable y
A researcher wants to measure average cardiovascular health of university students and compare those scores to the average scores in the general population. Assuming that population variance is known, what statistical test is most appropriate for this study? independent-samples t-test single-sample t-test z-test for sample mean related-samples t-test
P and A are independent, random variables. mean of P is 5 and its standard deviation is 3. mean of A is -2 and standard deviation is 6. what is mean of T= - 3P + 20 ? what is the mean of W= A - P? what is variance of D= P - 2A ?

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