Suppose again that m = 2, but that now the p-values for the two tests are negativelycorrelated, so that if one is large then the other will tend to be small. How does the family-wiseerror rate associated with these m = 2 tests qualitatively compare to the case of independenttests?Hint: First, suppose that whenever one p-value is less than a, then the other will be greaterthan a. In other words, we can never reject both null hypotheses.They are the same.FWER is greater for negatively correlated tests than for independent testsFWER is smaller for negatively correlated tests than for independent tests.

Answered: Image /qna-images/answer/bdaaa913-e73b-44b2-a93b-f62175862296.jpg

Answered: ppose again negative correlated, so…

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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A sample is selected from a population with a mean of m = 30 and a treatment is administered to the sample. If the treatment is expected to increase scores and a t statistic is used for a one-tailed hypothesis test, then which of the following is the correct null hypothesis?
For the following scenarios provide the following: the null and alternative hypotheses explain whether the hypothesis test is left-tailed, right-tailed, or two-tailed, explain how you should interpret a decision that rejects the null hypothesis, and explain how you should interpret a decision that fails to reject the null hypothesis. A Don Anderson Poll reports that on average 70% of Jamaicans believe that electricity bills are too high. b. Sunshine Cooperation guarantees that the mean shelf life of cornflakes is at least 750 days. Consumer Affairs has advised that the standard deviation of the fuel economies of its а. с. Honda Civics for 2016 is no more than 10.7 miles per gallon.
For a certain knee surgery, a mean recovery time of 9 weeks is typical. With a new style of physical therapy, a researcher dlaims that the mean recovery time, ET u, is less than 9 weeks. In a random sample of 84 knee surgery patients who practiced this new physical therapy, the mean recovery time is 8.9 weeks. Assume that the population standard deviation of recovery times is known to be 0.9 weeks. Is there enough evidence to support the claim that the mean recovery time of patients who practice the new style of physical therapy is less than 9 weeks? Perform a hypothesis test, using the 0.05 level of significance. (a) State the null hypothesis H, and the alternative hypothesis H. Hg: 0 OsO O20 O=0 ? (b) Perform a Z-test and find the p-value. Here is some information to help you with your Z-test. • The value of the test statistic is given by • The p-value is the area under the curve to the left of the value of the test statistic. Standard Normal Distribution 0.4 Step 1: Select…
If the p-value is very large (say close to 1), then it is likely that we will reject the null hypothesis. True False
Suppose a 95% confidence interval for the difference in test scores between Class 1 and Class 2 (in that order) is the following: 9 +/− 2. These results were based on independent samples of size 100 from each class. Now suppose you switch the order of Class 1 and Class 2 in your analysis but keep the data labeled correctly in terms of which class they came from. Which of the following statements is false? A) You can't do it this way. You'll get negative numbers for the difference in the means and/or negative numbers for the standard error. B) You are confident that the average for Class 2 is 7 to 11 points lower than for Class 1. C) You are still confident that the classes have significantly different mean scores. D) Your 95% confidence interval will now be entirely negative: from −7 to −11.
An institute conducted a clinical trial of its methods for gender selection. The results showed that 153 of 276 babies born to parents using a specific gender-selection method were boys. Use the sign test and a 0.05 significance level to test the claim that the method has no effect on the likelihood of a boy. Let p denote the population proportion of baby boys. Ignore the possibility of the method decreasing the likelihood of a boy. What are the null and alternative hypotheses? O A. Ho: p=0.5 H₂₁: p20.5 O C. Ho: p=0.5 H₁: p=0.5 O B. Ho:p>0.5 H₁: p=0.5 O D. Ho: p=0.5 H₁: p > 0.5 Find the test statistic. Test statistic = Find the P-value. P-value = (Round to four decimal places as needed.) Determine the proper conclusion. Choose the correct answers below. Since the P-value is (Round to two decimal places as needed.) than the significance level, evidence that the method used is effective in increasing the likelihood of a boy. the null hypothesis. There is
The body weight of a healthy 3-month-old colt should be about ? = 74 kg. You want to set up a statistical test to challenge the claim that ? = 74 kg. Suppose you want to test the claim that the average weight of a wild Nevada colt (3 months old) is less than 74 kg. State the null hypothesis H0 and the alternate hypothesis H1 . H0 : ? H1 : ? What kind of test is this? right-tailed testtwo-tailed test left-tailed test
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Looking at youth depression scores from a general sample of random children in the US, we want to determine if our sample is significantly different than the national average of scores of children with depression in the US. The national average of scores on a measure of depression is 5 points. We have no reason to assume it will be higher or lower than the US national average. The sample: 11 9 12 3 3 4 13 1. What is the null and alternative hypotheses? Do not specify any directionality. 2. What did you discover (using 95% Cl)? Provide an interpretation.
A hypothesis test on a regression coefficient fails to reject the null hypothesis at the 5% significance level. This means:
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Only about 18% of all people can wiggle their ears. Is this percent different for millionaires? Of the 374 millionaires surveyed, 45 could wiggle their ears. What can be concluded at the αα = 0.01 level of significance? For this study, we should use The null and alternative hypotheses would be: H0:H0: (please enter a decimal) H1:H1: (Please enter a decimal) The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 3 decimal places.) The p-value is αα Based on this, we should the null hypothesis. Thus, the final conclusion is that ... The data suggest the population proportion is not significantly different from 18% at αα = 0.01, so there is statistically significant evidence to conclude that the population proportion of millionaires who can wiggle their ears is equal to 18%. The data suggest the population proportion is not significantly different from 18% at αα = 0.01, so there is…

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