An automotive part must be machined to close tolerances to be acceptable to customers. Production specifications call for amaximum variance in the lengths of the parts of .0004. Suppose the sample variance for 30 parts turns out to be s 2 = .0005. Use a= .05 to test whether the population variance specification is being violated.a. State the null and alternative hypotheses.Ho : 0 SelectHạ : o2 Selectb. Calculate the value of the test statistic (to 2 decimals).c. The p-value is Selectd. What is your conclusion?Select

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Answered: An automotive part must be machined to…

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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A researcher samples 5 colony of Species of K and 5 colonies of Species L, measures their sizes as:Species K Species L4.7 5.35.2 4.66.1 4.15.8 4.85.2 4.2a. Test if mean colony size of Species K and Species L are different from each other? Report a p-value.(You may need to do an additional test to decide which test to apply for comparing the means)b. What is the power of the test in part a?c. The researcher would like to design a new experiment which will allow a two tailed hypothesis testwith significance 0.05 and power 0.90. What should be the sample sizes nK and nL for Species K and Species L (usek = 1)
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The population distribution of variable X consists of five values of 2, 5, 6, 8, and 9. Calculate the population mean and variance. List all possible samples of size 2 where samples are drawn with replacement and the corresponding means – determine the sampling distribution of the mean. Calculate the mean and variance of the sampling distribution of the mean. Differentiate between the results of a and c.
Use a 0.01 significance level to test the claim that the two samples of Yttrium concentrations (in ppm) are from populations with the same mean. Sample 1 30 X1 = 70.29 S1 22.19 Sample 2 n2 32 X2 = 74.26 S2 18.05 d.f.=29 to.005 = 2.756 to.01 = 2.462 to.025 = 2.045 to.05 = 1.669 to.10 = 1.311
Two accounting professors decided to test if the variance of their grades is different or no. To accomplish this, they each graded the same 10 exams with the following results: Standard Grade þeviation 22.4 12.0 Мean Professor 1 Professor 2 79.3 82.1 F What is the P-value of the test? Select one: Oa. between 0.01 and 0.025 Ob. between 0.025 and 0.05 c. between 0.05 and 0.10 Od. bigger than 0.10
An analysis of variance produces SSbetween = 30, SSwithin = 60, and an F-ratio with dfbetween = 2 and dfwithin 15. For this analysis, what is the F-ratio? a. 30/60 = 0.50 b. 60/30 = 2.00 c. 15/4 = 3.75 d. 4/15 = 0.27
I need help solving part a and b of the following question attached.
R. 4- For the following data. 1 2 3 4 27 32 29 36 Yt i- Calculate all the coefficients of the sample autocorrelation function and calculate the variance for these estimates. ii- Calculate the first 3 PACF and calculate the variance of these estimates.
Use the five steps in hypothesis testing. 1. Agriculture: Ground Water Unfortunately, arsenic occurs naturally in some ground water (Reference: UnionCarbide Technical Report K/UR-1. A mean arsenic level of parts per billion (ppb) is considered safe foragricultural use. A well in Texas is used to water cotton crops. This well is tested on a regular basis for arsenic. Arandom sample of 37 tests gave a sample mean x̄ = 7.2 ppb arsenic, with s= 1.9 ppb. Does this information indicate that the mean level of arsenic in this well is less than 8 ppb? Use a= 0.01
A researcher takes sample temperatures in Fahrenheit of 17 days from New York City and 18 days from Phoenix. Test the claim that the mean temperature in New York City is different from the mean temperature in Phoenix. Use a significance level of α=0.05. Assume the populations are approximately normally distributed with unequal variances. You obtain the following two samples of data. New York City Phoenix 99 94.2 95.5 72 93.2 86.8 102 122.1 85.4 114.4 80 94.7 86.4 89.7 75.4 104.7 79.5 77.6 83.4 106.8 64.3 98.6 65.5 91.5 87.7 82 104 97.7 74.3 64.9 59.5 82 82.8 72 116.2 The Hypotheses for this problem are: H0: μ1 = μ2 H1: μ1μ2 Find the p-value. Round answer to 4 decimal places. Make sure you put the 0 in front of the decimal. p-value =
There are two samples. Sample 1 has n=10 and a sample variance of 4. Sample 2 has n=8 and a sample variance of 9. Calculate the standard error of the difference between the two sample means (to 2 decimal points). Assume that the variances in the two populations that produced the samples are equal.
If other factors are held constant, which of the following sets of data would produce the largest value for an independent-measures t statistic? Question 3 options: The two samples both have n = 15, with sample variances of 20 and 25. The two samples both have n = 15, with variances of 120 and 125. The two samples both have n = 30, with sample variances of 20 and 25. The two samples both have n = 30, with variances of 120 and 125.

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