27ere to searchState whether each set of hypotheses is valid for a statistical test.(a) Ho: = 11 VS H₁: 11V(b) Ho:p # 0.8 VS H₁ p = 0.8(c) Ho: P₁ P2 VS HP P2(d) Ho: x1= x₂ VS 11:3₁ #3₂e Textbook and Media&7O

Solution-:State whether each of hypothesis is valid for a statistical test. (a) (b) (c) (d)

Answered: State whether each set of hypotheses is…

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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Test the claim that the mean GPA of night students is smaller than 2.7 at the 0.05 significance level. The null and alternative hypothesis would be: Ho:p 2.7 Ho: µ 0.675 H:p 2.7 H1:p Next Question M hp
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Alpha (a) is used to measure the error for decisions concerning true null hypotheses. What is beta (ß) error used to measure?
The table to the right contains observed values and expected values in parentheses for two categorical variables, X and Y, where variable X has three categories and variable Y has two categories. Use the table to complete parts (a) and (b) below. (a) Compute the value of the chi-square test statistic. 2 x² = = (Round to three decimal places as needed.) (b) Test the hypothesis that X and Y are independent at the α = 0.01 level of significance. O A. Ho: The Y category and X category have equal proportions. H₁: : The proportions are not equal. B. Ho: The Y category and X category are independent. H₁: The Y category and X category are dependent. O C. Ho: The Y category and X category are dependent. H₁: The Y category and X category are independent. O D. Ho: x = Ex and μy = Ey Hy H₁: Hx #Ex or Hy # Ey Y₁ Y₂ X₂ X3 45 49 X₁ 33 (34.82) (46.43)(45.75) 18 18 (16.18) (21.57) (21.25) 23 □
A researcher who wants to know whether the proportion of male births in a hospital is different from the established baseline of 51.07%, would like to test the following hypotheses: Ho:P = 0.51 vs. Ha :P = does not equal 0.51 a) Is the alternative hypothesis upper tail, lower tail, or two tailed? b) What do you conclude if the test results p-value of 0.03 at alpha value = 5% c) What do you conclude if the test results p-value of 0.08 at alpha value = 10%
Test the claim that the mean GPA of night students is smaller than 2.2 at the .05 significance level. The null and alternative hypothesis would be? H0:μ=2.2H0:μ=2.2H1:μ>2.2H1:μ>2.2 H0:μ=2.2H0:μ=2.2H1:μ≠2.2H1:μ≠2.2 H0:p=0.55H0:p=0.55H1:p≠0.55H1:p≠0.55 H0:μ=2.2H0:μ=2.2H1:μ<2.2H1:μ<2.2 H0:p=0.55H0:p=0.55H1:p>0.55H1:p>0.55 H0:p=0.55H0:p=0.55H1:p<0.55H1:p<0.55 Based on a sample of 60 people, the sample mean GPA was 2.19 with a standard deviation of 0.06The test statistic is: (to 2 decimals)The critical value is: (to 2 decimals)
State whether the standardized test statistic z indicates that you should reject the null hypothesis. (a) z = 2.345 (b) z = 2.238 (c) z= 2.179 (d) z = 2.447 (a) For z = 2.345, should you reject or fail to reject the null hypothesis? A. Fail to reject Ho because z > 2.330. B. Reject Ho because z2.330. 0 Zo = 2.330 4 Z
Determine the critical value, zo, to test the claim about the population proportion p20.132 given n= 48 and p 0.110. Use a=0.05. O A. - 1.645 OB. -1.96 C. - 2.575 O D. -2.33 Click to select your answer. Dec 04, 2009 Compute the value of the test statistic? | Yahoo Answers 0 0 9 G Type here to search
You are conducting a hypothesis test where the null hypothesis is that true population mean is less than or equal to 180. Your test will be at the 0.10 significance level. You take a sample of size n=60, and find that the sample average is 185, and the STANDARD ERROR is 15. What is the value of your test statistic? (Please answer to two decimal places. ex: 5.43)
A survey claims that 8 out of 10 customers recommend Western Drugs for pharmacy issues. To test this claim, a random sample of 100 customers is obtained from the list of rewards customers. Of these 100 customers, 72 indicate that they recommend using Western Drugs for pharmacy needs. We would like to know if this claim is accurate. Use alpha = 0.05 a. Write the null and alternative hypotheses. b. Let's perform a one sample z-test for proportions: What is the value of the test statistic? c. What is the associated P-value? d. State your conclusion using α = 0.05.
Test the claim that the mean GPA of night students is larger than the mean GPA of day students at the 0.005 significance level. The null and alternative hypothesis would be: Họ: PN 2 pp Họ:N 2 D Ho: PN PD H1 : UN + UD Hị:PN + PD H1: N > uD The test is: right-tailed two-tailed left-tailed The sample consisted of 30 night students, with a sample mean GPA of 2.18 and a standard deviation of 0.07, and 30 day students, with a sample mean GPA of 2.14 and a standard deviation of 0.08. The test statistic is: (to 2 decimals) The p-value is: (to 2 decimals) Based on this we: Fail to reject the null hypothesis Reject the null hypothesis
According to the most recent General Social Survey, 70% of adults watch TV nightly. A researcher believes that the proportion of college students who watch TV nightly is less than this. To test this claim the research samples 400 college students and finds that 276 watch TV nightly. At the 0.05 level of significance does this data provide evidence to suggest that the proportion of college students who watch TV nightly is less than 70%? Select the correct hypothesis test for this problem:

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State whether each set of hypotheses is valid for a statistical test. (a) Ho: μ = 11 VS H₁: #11 (b) Ho:p 0.8 VS H₁: p=0.8 (c) Ho: PP₂2 VS Ha: Pl> P2 (d) Hox1 = x₂ VS 11:3₁ #3₂