Answered: Assume that the null hypothesis is…

Assume that the null hypothesis is really TRUE. Under that condition, any difference in group means found in a well-designed test of the hypothesis must be due 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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Question

Assume that the null hypothesis is really TRUE. Under that condition, any difference in group means found in a well-designed test of the hypothesis must be due to

Question 17 options:

	random error
	the treatment
	an extraneous variable.
	such a situation cannot happen

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a. After performing a biological experiment, you have rejected the Null Hypothesis (H,) stating no significant difference between five compared means. You follow up these results with a post hoc comparison. However, you prefer not to use three tests which are not popular at the present time. What are these tests and what are the reasons for not using them? 2
. If a hypothesis test is a two-tailed test and the test statistic is t = 2.687 when n = 19, what is the P-value of the test? Must also show picture with degrees of freedom.
Which of the following is not one of the four steps of the hypothesis test? A. State the level of significance, choose a test, and check the conditions for the test B. Make a decision to reject or not reject the null hypothesis C. State the null and alternative hypothesis about the population parameter D. All of the these are steps of the hypothesis test
38
Passed Failed O White 15 17 Results from a civil servant exam are shown in the table to the right. Is there sufficient evidence to support the claim that the results from the test are discriminatory? Use a 0.05 significance level. candidates Minority candidates 10 25 Determine the null and alternative hypotheses. O A. Ho: A white candidate is more likely to pass the test than a minority candidate. H,: A white candidate is not more likely to pass the test than a minority candidate. O B. Ho: White and minority candidates do not have the same chance of passing the test. H1: White and minority candidates have the same chance of passing the test. OC. Ho: White and minority candidates have the same chance of passing the test. H,: White and minority candidates do not have the same chance of passing the test. O D. Ho: A white candidate is not more likely to pass the test than a minority candidate. H1: A white candidate is more likely to pass the test than a minority candidate. Determine the…
Suppose that in a random selection of 100 colored candies, 26% of them are blue. The candy company claims that the percentage of blue candies is equal to 25%. Use a 0.05 significance level to test that claim. Identify the null and alternative hypotheses for this test. Choose the correct answer below. OA. Ho: p=0.25 H₁: p>0.25 OB. Ho: p=0.25 H₁: p=0.25 O C. Ho-p=0.25 H₁: p<0.25 lete OD. Ho: p=0.25 H₁: p=0.25 Identify the test statistic for this hypothesis test.
7. Question: The power of a test is measured by its capability of: a. Accepting a null hypothesis that is true. b. Rejecting a null hypothesis that is true. c. Rejecting the alternative hypothesis that is false. d. Rejecting a null hypothesis that is false. e. None of the mentioned.
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Some people claim that they can tell the difference between a diet soda and a regular soda in the first sip. A researcher wanting to test this claim randomly sampled 84 such people. She filled 84 plain white cups with soda, half diet and half regular through random assignment, and asked each person to take one sip from their cup and identify the soda as diet or regular. 51 participants correctly identified the soda. Conduct and interpret a hypothesis test for the following question: are these people any better or worse at telling the difference between diet and regular soda than random guessing (correctly identify soda half of the time)? HINT: what is your hypothesized proportion if you want to test if these participants are right or not half of the time? Use a = .01 significance level. Solve Critical value:
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