An experiment was run to determine whether four specific firing temperatures affect the density of a certain type of brick. Acompletely randomized experiment led to the following data:TemperatureDensity21.710021.821.921.621.712521.421.821.721.521.415021.921.821.621.517521.921.721.821.4The research hypothesis is that firing temperature affect the density of the bricks. Use a= 0.05.Analysis of VarianceTestMethodDFH-ValueP-ValueNot adjusted for ties4.550.208Adjusted for ties3.4.700.195What are the test statistic value, decision and conclusion?O 4.7; Do not reject Ho: Data do not show sufficient evidence to say that at least one median of brick density is different thanthe other, at the 5% significance level.O 4.55; Do not reject Ho: Data do not show sufficient evidence to say that at least ono median of brick density is different thanthe other, at the 5% significance lovel.O 0.195; Do not reject Ho: Data do not show sufficient ovidence to say that at least one median of brick density is differentthan the other, at the 5% significance level.O 0.157; Do not reject Ho: Data show sufficient evidence to say that temperature does not affect brick density, at the 5%significance value.

Introduction: It is required to test whether the different firing temperatures affect the density.

Answered: An experiment was run to determine…

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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Listed below are the lead concentrations in μg/g measured in different traditional medicines. Use a 0.10 significance level to test the claim that the mean lead concentration for all such medicines is less than 16 μg/g.Assume that the sample is a simple random sample. 7.5 6 8 9.5 5.5 22.5 15.5 16.5 13 16
The following data represent petal lengths (in cm) for independent random samples of two species of iris. Petal length (in cm) of Iris virginica: x1; n1 = 36 5.2 5.8 6.1 6.1 5.1 5.5 5.3 5.5 6.9 5.0 4.9 6.0 4.8 6.1 5.6 5.1 5.6 4.8 5.4 5.1 5.1 5.9 5.2 5.7 5.4 4.5 6.4 5.3 5.5 6.7 5.7 4.9 4.8 5.7 5.1 5.1 Petal length (in cm) of Iris setosa: x2; n2 = 38 1.4 1.8 1.4 1.5 1.5 1.6 1.4 1.1 1.2 1.4 1.7 1.0 1.7 1.9 1.6 1.4 1.5 1.4 1.2 1.3 1.5 1.3 1.6 1.9 1.4 1.6 1.5 1.4 1.6 1.2 1.9 1.5 1.6 1.4 1.3 1.7 1.5 1.5 (a) Use a calculator with mean and standard deviation keys to calculate x1, s1, x2, and s2. (Round your answers to four decimal places.) x1=s1=x2=s2= (b) Let μ1 be the population mean for x1 and let μ2 be the population mean for x2. Find a 99% confidence interval for μ1 − μ2. (Round your answers to two decimal places.) lower limitupper limit
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Listed below are the lead concentrations in μg/g measured in different traditional medicines. Use a 0.10 significance level to test the claim that the mean lead concentration for all such medicines is less than 18 μg/g. Assume that the sample is a simple random sample. 12.5 11 10.5 21 11.5 17.5 8 12 8 18.5
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. The term sample usually refers to a sample that ___ - Consists of people with chemical dependency problems - Uses the same group of individuals with a before/after measurement - Requires a dependent variable for hypothesis testing - Is randomly selected from two dependent populations
In an investigation of the visual scanning behaviour of deaf children, measurements of eye movement rates were taken on nine deaf and nine normal children as shown in the table below Deaf Children Normal Children 1.81 0.95 2.2 1.49 3.29 1.12 2.13 1.07 2.55 1 2.24 1.85 2.22 1.18 2.89 2.07 2.26 1.18 a. If the two samples are drawn from normal populations, test the hypothesis that on average eye movement rate for normal children is less than deaf children in the population at a 10% level of significance. b. What does the 10% level of significance mean? Does it appear that the distributions of eye-movement rates for deaf children and normal children differ at 5% level of significance (assuming samples are not drawn from normal population)? с.
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Listed below are the lead concentrations in μg/g measured in different traditional medicines. Use a 0.10 significance level to test the claim that the mean lead concentration for all such medicines is less than 21 μg/g. Assume that the sample is a simple random sample. 19.5 21 7.5 19 14 20 10 12 21.5 16.5

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