Lab #17-Hypothesis, p-values, and alpha levels For problems 1-4, write the null and alternative hypotheses you would use to test each. A governor is concerned about his "negatives"-the percentage of state residents who express disapproval of his job performance. His political committee pays for a series of TV ads, hoping that they can keep the negatives below 30%. They will use follow-up polling to assess the ads, effectiveness 1. Ho: Ha: 2. Is a coin fair? Ho: Ha: Only about 20% of people who try to quit smoking succeed. Sellers of a motivational tape claim that listening to the recorded messages can help people quit. 3. Ho: Ha: In the 1950s only about 40% of high school graduates went on to college. Has the percentage changed? 4. Ho: Ha:

Lab #17-Hypothesis, p-values, and alpha levels For problems 1-4, write the null and alternative hypotheses you would use to test each. A governor is concerned about his "negatives"-the percentage of state residents who express disapproval of his job performance. His political committee pays for a series of TV ads, hoping that they can keep the negatives below 30%. They will use follow-up polling to assess the ads, effectiveness 1. Ho: Ha: 2. Is a coin fair? Ho: Ha: Only about 20% of people who try to quit smoking succeed. Sellers of a motivational tape claim that listening to the recorded messages can help people quit. 3. Ho: Ha: In the 1950s only about 40% of high school graduates went on to college. Has the percentage changed? 4. Ho: Ha:

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Description: Hi need help answering these questions, thank you. Lab #17-Hypothesis, p-values, and alpha levelsFor problems 1-4, write the null and alternative hypotheses you would use to test each.A governor is concerned about his "negatives"-the percentage of st

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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Problem 3You’re a healthcare engineering consultant and you’re analyzing the emergency room design at Pawhuska Hospital, Inc. Below you’ll find sample data for the waiting time (in minutes) of non-critical patients entering the emergency room.a. The hospital administrator wants to make the claim that average waiting time for non-critical patients is less than an hour. What is your opinion of that claim using the p-value approach? (note that you’d probably reject any null hypothesis if p-value < 0.1)b. In fact, you believe that at least a third of the non-critical patients arriving to the emergency room wait more than an hour. Test your claim with the critical value approach and 95% confidence. DATA: Obs Wait time 1 33.5 2 33.1 3 44.4 4 58.3 5 44.2 6 92.1 7 22.1 8 82.9 9 60.5 10 84.6 11 20.6 12 89.6 13 11.8 14 86.8 15 22.2 16 119.2 17 36.6 18 58.2 19 14.9 20 55.5 21 41.9 22 26.9 23 68.2 24 51.4 25 19.7 26 53.8 27 13.5 28…
For Problems 1 and 2, a sample of 50 patients undergoing a new type of chemotherapy is collected and analyzed, using properly randomized sampling techniques and properly blinded observation techniques. Identify the following for each scenario presented: i. The sample statistic is used to estimate the desired population parameter. ii. The confidence level of the range estimate being used. iii. The confidence interval for the desired population parameter based on the 1. The average percent reduction in the size of the tumor was 48.5%, which is accurate to within a margin of 7.3%, 99 times out of 100. 2. The proportion of patients who were recommended surgery to remove the tumor after undergoing treatment was 0.64, which is accurate to within a margin of 0.045, 99 times out of 100.
Problem 2:Examine the relationship between amount of time spent studying for an exam (X) in hours andthe score that person makes on an exam (Y)X Y2 653 703 754 705 856 857 90 using spss Give the following:1. Null hypothesis2. Alternative hypothesis3. Statistical test4. Computation5. Decision6. Conclusion
Problem 6: Please answer parts a and b! (a) A genetic model suggests that 80% of plants grown from a cross between two given strains of seeds will be of the dwarf variety. After breeding 201 of these plants, 153 were observed to be of the dwarf variety. Do these data strongly contradict the genetic model? Find the p-value. (b) At the 1% significance level, what is the conclusion of the above hypothesis test?
Question 1 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. A meal supplement provider claims that the average difference in calories between two brands is 55.
If n1 = 4 and n2 = 3, how many degrees of freedom do you have? Also referring to problem 4, n1 = 4and n2 = 3, at the 0.10 level of significance, what is the critical value for a two tail test and is there evidence that µ1 > µ2?
Question 1 A meal supplement provider claims that the average difference in calories between two brands is 55. 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.
Please answer the following Questions. Part 1.1. A statistical test measures the experimental strength of evidence against the ____ hypothesis. Part 1.2. Type I error is when you end up rejecting the null hypothesis as a result of the statistical testing, when in fact the null hypothesis is actually ____."
problem 1 A local health centre noted that in a sample of 400 patients, 80 were referred to them by the localhospital.a. Provide a 95% confidence interval for all the patients who are referred to the health centre bythe hospital. b.What sample size would be required to estimate the proportion of all hospital referrals to thehealth centre with a margin of error of 0.04 or less at 95% confidence? problem 2 The data in the table below presents the hourly quantity of production for three lines of productionprocesses over the first 4 days in XYZ Company. Answer the questions based on the Excel Output givenbelow. Day Process 1 Process 2 Process 31 33 33 282 30 35 363 28 30 304 29 38 34 a.State the null and alternative hypothesis for single factor ANOVA.b. State the decision rule (α = 0.05).c. Calculate the test statistic. d. Make a decision.
Problem 1. A study was done to investigate if number of friends is a predictor of physical health, as measured by a monthly symptom checklist (0-50). A sample of 57 participants was used. Assume an alpha level of .05 and a two-tailed test. Calculate the appropriate test statistic given that SSy = 20.6 and r = .5. Note: no need to put the sign in front of the value. Note: round to the nearest hundredth Do you reject the null hypothesis? Yes No -What is your conclusion regarding the findings? Be sure to discuss the IV and the DV. - What is the standard error of estimate (SE)?
Problem 3: Please answer parts a, b, and c! A sample of 136 hypertensive people were given an anti-hypertensive drug, and the drug was found to be effective in 49 of those people. (By effective, we mean that their diastolic blood pressure is lowered by at least 10 mm Hg as judged from a repeat measurement taken 1 month after taking the drug.) (a) Find a 90% confidence interval for the true proportion of the sampled population for which the drug is effective. (b) Using the results from the above mentioned survey, how many people should be sampled to estimate the true proportion of hypertensive people for which the drug is effective to within 4% with 96% confidence? (c) If no previous estimate of the sample proportion is available, how large of a sample should be used in (b)?
The mayoral challenger claims that less than 30% of residents over the age of 25 have bachelor’s degrees in our city. To test this claim, you survey 80 adults over the age of 25 and find only 18 possess bachelor’s degrees. At the 5% level of significance, is there enough evidence to SUPPORT the challenger’s claim? Complete the correct calculator with the values from the problem. 6.) Compare the p-value with the level of significance. Is the p-value less than or greater than alpha? 7.) Based on your answer in #6, do we reject or fail to reject the null Ho? 8.) Based on your answer in #7, do we support or fail to support the claim? 9.) At the 5% level of significance, is there enough evidence to SUPPORT the challenger’s claim? Give a full conclusion statement. Don't forget to include the level of significance and restate the claim.