Assume a type I error has been committed. Given the weakness of the independent t-test, what is one possible explanation for the error?
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Assume a type I error has been committed. Given the weakness of the independent t-test, what is one possible explanation for the error?
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- (Problem for Questions 22- 25). In a study focusing on children on the autism spectrum a team of psychologists were interested in the distribution of the children on the spectrum. After having 100 children complete some tests, they categorized children as Low, Medium, High on the autism spectrum. They counted how many children were in each category and this is what they came up with: Low AS 44 Medium AS 30 High AS 26With explanation, True or False: Suppose your agency has been evaluating an intervention using a one-group pretest-posttest design with 200 participants and a dichotomous dependent variable, the Mann-Whitney U test would be appropriate for testing the null hypothesis of no intervention effect (i.e., no change from before to after the intervention)?rejecting a true alternative hypothesis, H1 leads to committing a type II error True or False
- Identify the type I error and the type II error that corresponds to the given hypothesis. The proportion of people who write with their left hand is equal to 0.26.To identify the correct Z(critical), it is important to determine whether the hypothesis test is one-tailed or two-tailed. The decision between a one- and two-tailed hypothesis is based on the researcher's expectations about the population from which the sample was selected. Many people believe that millennials are having more sex than people during the sexual revolution. You wonder whether the cohort currently in their twenties had sex at an earlier age than older generations. Assume that the the average age of first sexual intercourse is 17.4 years. You obtain a sample that yields a sample mean of X = 15.9 years. Let u denote the average age of first sexual intercourse. Formulate your null and research hypotheses by selecting the appropriate values in the dropdown menus that follow. Ho: (H₁: The test you conduct is test. Note: A one-tailed test is described as a lower-tailed test if the null hypothesis is rejected for values of the test statistic in the lower tail of its…In the test of a certain hypothesis the p-valuecorresponding to the test statistics is 0.0316. Can the null hypothesis be rejected at the; i. 0.01 level of significance? ii. 0.05 level of significance? iii. 0.10 level of significanc
- Suppose a hypothesis test was performed with a level of significance of 0.05. Then if the null hypothesis is actually true, then there is a 5% chance that the researcher will end up rejecting the null hypothesis in error. True FalseQ3 Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, and then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Among 2125 passengers cars in a particular region, 229 had only rear license plates. Among 326 commercial trucks, 47 had only rear license plates. A reasonable hypothesis is that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passengers cars. Use a 0.01 significance level to test that hypothesis. A. Identity the nulls and alternative hypotheses B. Identify the test statistic ( round to two decimal places as needed) C. Identify the p- values (round to two decimal places as needed ? State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. A. Fail to reject Ho. There is not sufficient evidence to support the claim that commercial trucks owners…Identify the type I error and the type Il error that correspond to the given hypothesis. The percentage of households with more than 1 pet is less than 65%. Identify the type I error. Choose the correct answer below. A. Reject the null hypothesis that the percentage of households with more than 1 pet is equal to 65% when that percentage is actually equal to 65%. B. Reject the null hypothesis that the percentage of households with more than 1 pet is less than 65% when that percentage is actually less than 65%. O C. Fail to reject the null hypothesis that the percentage of households with more than 1 pet is less than 65% when the percentage is actually equal to 65%. O D. Fail to reject the null hypothesis that the percentage of households with more than 1 pet is equal to 65% when that percentage is actually less than 65%. Identify the type Il error. Choose the correct answer below. O A. Reject the null hypothesis that the percentage of households with more than 1 pet is less than 65%…
- A z-test is to be performed for a population mean. Express the decision criterion for the hypothesis test in terms of x. That is, determine for what values of x the null hypothesis would be rejected. ala After training intensively for six months, John hopes that his mean time to run 100 meters has decreased from last year's mean time of 11.8 seconds. He performs a hypothesis test to determine whether his mean time has decreased. Preliminary data analyses indicate that it is reasonable to apply a z-test. The hypotheses are Ho:u= 11.8 seconds H:u11.64 O Reject H, if x 11.61 Submit Assignment 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use | Privacy IIA researcher was doing a study for a new Coronavirus Drug and conducted a hypothesis test like this one: H0: μ = 18 Ha: μ ≠ 18 a. What type of test is this? left-tailed right-tailed two-tailed b. She obtained a test statistic of 0.75, with a p-value of 0.4648. So she concluded that her true mean must be equal to 18. Is this interpretation correct? Yes No Why or why not?hopes that the results of a trial period will enable her to conclude with a level of significance of 0.05 that the new procedure increases the average profit of installing a carpet. What will be the consequences if she makes a Type I error on her hypothesis test? A Type I error would mean that Carpetland implements a new procedure that actually decreases profits. A Type I error would mean that Carpetland implements a new procedure that actually increases profits. A Type 1 error would mean that Carpetland does not implement a new procedure that increases profits. A Type I error would mean that Carpetland does not implement a new procedure that decreases profits.. A Type I error would mean that Carpetland implements a new procedure that actually does not increase profits. A Type I error would mean that Carpetland implements a new procedure that actually does not decrease profits.
