IDetermine a the X² test statistic (b) the degreesof freedom (c) the critical value= 0.05d) test the hypothesis at the at 0.05Nevel of significanceНоH₂ = PA = PB =PC = PD. = 4H₁: At least one of the proportions is differentfrom the othersAOutcomeObservedExpected yo38a) The test Statistic isB C3942что чоD8178°F9140

Categories Observed A 38 B 39 C 42 D 41

Answered: 0.65 Determine of the X² test Statistic…

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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For this study, we should use The null and alternative hypotheses would be: z-test for a population proportion or t-test for a population mean Ho: (p or u) (please enter a decimal) H1: (p or u) (Please enter a decimal) The test statistic z = (please show your answer to 3 decimal places.) The critical value = (Please show your answer to 3 decimal places.) The test statistic (is or is not) in the rejection region. Based on this, we should (reject or accept or fail to accept) the null hypothesis. Thus, the final conclusion is that ... The data suggest the population proportion is not significantly larger 50% at � = 0.05, so there is not sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is larger 50%. The data suggest the populaton proportion is significantly larger 50% at � = 0.05, so there is sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is…
Module 5: Ihd Use the table of values and the expected frequencies to calculate the residual values and the chi square test statistic X XYZ A 34 44 22 B 19 53 32 Expected Frequencies A 25.98 47.549 26.471 B 27.02 49.451 27.529 Residual Values (Row i and column j) Chi Square Test Statistic (0.,, – E. ) E (0 – E) x =E E Round all values to 3 decimal places Y B The Chi Square Test Statistic x =
Suppose are running a study/poll about the proportion of men over 50 who regularly have their prostate examined. You randomly sample 116 people and find that 99 of them match the condition you are testing. Suppose you are have the following null and alternative hypotheses for a test you are running: Но: р — 0.83 На :р> 0.83 Calculate the test statistic, rounded to 3 decimal places = Z
research team wants to investigate the impact of increased sun exposure to a decrease in depression. In order to do so, the team gathers a SRS of 124 individuals with a sample average score on the Geriatric Depression Scale (GDS) of 7.5 from a population with σ=.4 after consistent sun exposure above 7 hours a day. Assume a clinical diagnosis for depression can only be given with a GDS score of 9. A) Is the team correct in their hypothesis? B) State and interpret your results.
We are wondering if the proportions of voters who rejected the proposal to institute astate lottery vary by sex. Random samples from each sex are gathered and the following samplestatistics computed. For males (sample1): •proportion (p1) =0.35 •Sample size (n1) =178 For females (sample2): •Proportion (p2) =0.25 •Sample size (n2) =212 Test the research question atα=0.05 (two-tailed) with the five-step processes and concludeyour decisions. 1. Evaluate assumptions if we can use at-test and summarize parameters and statistics. 2. State the null hypothesis (i.e.,H0) and the working hypothesis (i.e.,H1). 3. Establish the critical region fort-distributions atα=0.05with a two-tailed test. 4. Compute the test statistics (i.e.,tobtained) and the corresponding probability (i.e.,p-value). 5. Make a decision and interpret test results.
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The random variable x has a normal distribution with mean 50 and variance 9. Find the value of x, call it x0, such that: a) P(x ≤ xo) = 0.8413 b) P(x > xo) = 0.025 c) P(x > xo) = 0.95 d) P(41 ≤ x ≤ xo) = 0.8630
15

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