MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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True or false: The P-value is the smallest significance level for which the observed sample data result in rejection of the null hypothesis.
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- Define the related-repeated (pre/post) two-sample t-test and the related-matched two-sample t-test.arrow_forwardDr. Dream, an expert in infectious diseases, wanted to estimate theproportion of the adult population in the U.S. that received a flu vaccine.They randomly sample 866 individuals and 388 of them received a fluvaccine. They decide to report a 90% confidence interval for the populationproportion.a. What is the value of the standard error? b. What is the value of the margin of error?arrow_forwardFor a hypothesis test, significance level, alpha, = 0.05 The computed P-Value = 0.067 complete sentence: This (choose one: large, small) p-value suggests that if the (choose one: alternative hypothesis H_a, null hypothesis H_0) were true, then the observed sample data would be (choose one: not unusual, unusual)arrow_forward
- In a study of the accuracy of fast food drive-through orders, one restaurant had 36 orders that were not accurate among 338 orders observed. Use a 0.01 significance level to test the claim that the rate of inaccurate orders is equal to 10%. Does the accuracy rate appear to be acceptable? The test statistic for this hypothesis test is The P-value for this hypothesis test isarrow_forwardA tennis racquet is spun 100 times, landing with the label facing up 47 times and the label facing down 53 times. Perform a test of whether or not a spun tennis racquet would not land up 50% of the time in the long run.What is the smallest significance level at which you would reject the null hypothesis?Use the sample data to find a 99% confidence interval for the long-run proportion of times that the racquet would land up.arrow_forwardFor a one-tailed (upper tail) hypothesis test with a sample size of 26 and a .01 level of significance, the critical value of the test statistic t isarrow_forward
- University personnel are concerned about the sleeping habits of students and the negative impact on academic performance. In a random sample of 377 U.S. college students, 209 students reported experiencing excessive daytime sleepiness (EDS). Is there sufficient evidence to conclude that more than half of U.S. college students experience EDS? Use a 5% level of significance. What is a 90% confidence interval estimate for the proportion of all of U.S. college students who experience excessive daytime sleepiness? PLAN: State the name of the appropriate estimation procedure (e.g. one-sample t confidence interval for estimating the mean difference). You have already listed the conditions, now check the condition for the normality of the sampling distribution of p-hat for confidence interval estimationarrow_forwardAn online poll asked: "Do you believe the Loch Ness monster exists?" Among 20,833 responses, 63% were "yes." Use a 0.10 significance level to test the claim that most people believe that the Loch Ness monster exists. How is the conclusion affected by the fact that Internet users who saw the question could decide whether to respond? -Find test statistic -Find P-value -Find conclusionarrow_forward
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