Is the hypothesis above a one-tail or a two-tail hypothesis? 11. F. N. David used a modern sheep astragalus to estimate the chances of its landing on each ofthe four sides and provided us with the frequencies that we considered for the "fair" astragalus4.ייYou attempt to check that the frequency of getting a "1" that we used for a "fair" astragalus isילaccurate by conducting an experiment of your own. Your experiment consists of throwing a goatastragalus 1,000 times. Out of your sample of 1,000 throws of the goat astragalus, 89 times itlanded on "1".Write the null and the alternative hypothesis that the population proportion of "1"s obtainedfrom throwing a goat astragalus is the same as the number obtained by F. N. David using a sheepastragalus (i.e. the probability we used for a "fair" astragalus up to now). 12. Is the hypothesis above a one-tail or a two-tail hypothesis?

We have given that Sample size n= 1000 Favorable cases x = 89 Sample proportion p^=x/n

Answered: 2. Is the hypothesis above a one-tail…

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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Data shows that 11% of fatal vehicle accidents involved large trucks. A statistician for an insurance company believes that is higher than 11%. The statistician randomly selected 200 fatal vehicle accidents and finds that 26 involve large trucks. Is the statistician correct? What is the test statistic for this hypothesis test? Data shows that 11% of fatal vehicle accidents involved large trucks. A statistician for an insurance company believes that is higher than 11%. The statistician randomly selected 200 fatal vehicle accidents and finds that 26 involve large trucks. Is the statistician correct? What is the test statistic for this hypothesis test? 0.9040 0.1830 0.3660 0.8170
Why is hypothesis testing important?
A highly selective MBA program wants their students' average score on the GMAT exam to be greater than 650. They want to be able to assert with 95% confidence that this is true in their admissions materials. Select the correct symbols to use in the alternate hypothesis for this hypothesis test. Ha: [ Select ] [ Select ] v 650.
We might want to determine if an average salary for a particular state is less than $70,000. It can be difficult to gather information for all salaries for this state. Thus, a hypothesis test would be helpful. What would be the null and alternative hypothesis for this example?
Now that you are an adult, you decide to test one of the truisms passed along by your mother: “Cheaters never win in the end.” You randomly assign a group of 20 children to either cheat or to play fair on a scavenger hunt. You then record the number of items found by each child during the scavenger hunt. What statistical test would you use to determine whether cheaters finish differently than noncheaters?
A teacher is comparing the mena study time of his freshmen and senior students. He believes that his senior students spend more time studyin per week than his freshmen studnet and decides to perform a hypothesis test on his belief. a. Suppose the decision of the hypothesis test is to reject the null hypothesis. If, in realiry, treshmen study for a mean of 10 hours per week and seniors study for a mena of 15 hours per week, was an error made? if so, what type? b. Suppose the decision of the hypothesis test is to fail to reject the null hypothesis. if, in realiry, freshmen study for a mena of 15 hours per seek and seniors study for a mean of 15 hours per week, was an error made? is so, what type?
Example 2: Bryan coaches track and field at a local high school and during the previous season he got the impression that his 800m runners performed better when their races were in the morning as opposed to the afternoon. This season, he wanted to determine if his runners in fact performed better in the morning so he recorded all of their times for each race throughout the entire season. The data that he recorded for the morning and afternoon races are shown below. Carry out an appropriate hypothesis test at the a = 0.05 level to determine if his 800m runners performed better in the morning than in the afternoon. Sample Size Standard Deviation Average Morning 38 14 122 Afternoon 54 13 124
The academic planner of a university thinks that at least 39% of the entire student body attends summer school. Which of the following is the correct set of hypotheses to test his belief? Ho: p 2 0.39 H3: p 0.39 Ho: p > 0.39 Ha: ps 0.39
In a sample of 183 male job-holders, 55% said that they are satisfied with their jobs. In another sample of 171 female job-holders, 65% said that they are satisfied with their jobs. The null hypothesis is that the proportions of all female and all male job-holders who are satisfied with their jobs are equal. The alternative hypothesis is that the proportion of all female job-holders who are satisfied with their jobs is greater than the proportion of all male job-holders who are satisfied with their jobs. The significance level is 2%. What is the approximate p-value for this test? e. 0.9732 b. 0.9975 d. 1.0000 a. 0.9139 c. 0.9724
What are the null and alternative hypotheses? A. H0: The two variables, x and y, are associated. Ha: The two variables, x and y, are not associated. B. H0: The variable x is dependent upon y. Ha: The variable y is dependent upon x. C. H0: The two variables, x and y, are not associated. Ha: The two variables, x and y, are associated. The P-value is (Round to three decimal places as needed.) What is the conclusion of the independence test? A. Do not reject H0. The data provide sufficient evidence of an association. B. Reject H0. The data provide sufficient evidence of an association. C. Do not reject H0. The data do not provide sufficient evidence of an association. D. Reject H0. The data do not provide sufficient evidence of an association.
The National Association of Realtors reported that 26% of home buyers in the state of Florida are foreigners in 2012. The correct hypothesis statement to test the validity of this report would be a. O b. O c. d. H0: p = 0.26; H1: p + 0.26. H0: p = 0.26; H1: p > 0.26. H0: p = 0.26; H1: p < 0.26. H0: p = 0.26; Hl: p = 0.26.
Can the null hypothesis be a greater than or less than or is it always equals?

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