Hypotheses for a chi-square goodness-of-fit test are given, along with the observed and expected counts. Calculate the chi-square statistic for this test. Hypotheses: H0:pA=0.5,pB=0.25,pC=0.25H0:pA=0.5,pB=0.25,pC=0.25 Ha:Ha: Some pipi is not as given Sample Data: A B C Observed(Expected) 234(196.5)234(196.5) 86(98.25)86(98.25) 73(98.25)73(98.25) Round your answer to one decimal place. χ2=

Hypotheses for a chi-square goodness-of-fit test are given, along with the observed and expected counts. Calculate the chi-square statistic for this test. Hypotheses: H0:pA=0.5,pB=0.25,pC=0.25H0:pA=0.5,pB=0.25,pC=0.25 Ha:Ha: Some pipi is not as given Sample Data: A B C Observed(Expected) 234(196.5)234(196.5) 86(98.25)86(98.25) 73(98.25)73(98.25) Round your answer to one decimal place. χ2=

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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Use the following scenario to answer the next 6 questions. An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 30 engines and the mean pressure was 4.8 psi with a standard deviation of 1 psi. If the valve was designed to produce an overall mean pressure of 5.0 psi, is there sufficient evidence at the 10% level of significance that the valve performs below specifications? The appropriate hypothesis test for this scenario is: Group of answer choices right-tailed two-tailed left-tailed
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 shown below are among the results obtained in the study. Higher scores correspond to greater pain levels. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) to (c) below. Reduction in Pain Level After Magnet Treatment (μ1): n=29, x=0.58, s=0.95 Reduction in Pain Level After Sham Treatment (μ2): n=29, x=0.48, s=1.56 Question content area bottom Part 1 a. Use a 0.05 significance level to test the claim that those treated with magnets have a greater mean reduction in pain than those given a sham treatment (similar to a placebo). What are the null and alternative hypotheses? A. H0: μ1≠μ2 H1: μ1<μ2 B. H0: μ1<μ2 H1:…
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Degrees of freedom:
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