tabcaps lockshiftTextEdit File Edit Format View WindowTimes New Roman Bod...esc7alfI7QANFormat View Window HelpHypothesis Test Assignment (1) f12--ADIUE DE5. A professor at a community college claims that a college algebra student can increase hisor her score on an exam if the person is provided with a pre-test the week before theexam. To test her theory, she selected 16 college algebra students at random and gavethese students a pre-test the week before an exam. She also selected a random sample of12 students who were given the same exam but did not have access to a pre-test. The firstgroup had a mean score of 79.4 with standard deviation 8.8. The second group had almean score of 71.2 with standard deviation 7.9. Test to see if the population mean scoreof students who get a pre-test is different from the population mean score of those who donot. Use a 5% significance level.a)State the null and alternate hypotheses.b)Would you use the normal distribution (z) or Student's (t) distribution? Why?c)State the test statistic and p-value of your test. Round your answers to fourdecimal places.W28MacBook Air20F102WSX80,#3ED$4gogDDD F4CRF%5VFSTG6BY&7H44 17UN*➤ll faFO8JM1998% (+) Thu 10:54 PM Madelyn Barker QIEwould bether up oron is -1.ppositepadmill thekes to getKO<0L4)FIAB(PF12B?Ialtdeleteenterretur

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Answered: Hypothesis Test Assignment (1) f man…

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 researcher wants to know if there is a relationship between gender and the likelihood of being a psychology major. A sample of n=200 participants is surveyed and the observed results are presented in the table below. Male Female Yes 20 70 No 80 30 Which of the following lists the appropriate hypotheses for this question and data? a. Ho (null): the variables are independent; H1 (alternative): the variables are not independent b. Ho (null): the variables are not independent; H1 (alternative): the variables are independent A researcher wants to know if there is a relationship between gender and the likelihood of being a psychology major. A sample of n=200 participants is surveyed and the observed results are presented in the table below. Male Female Yes 20 70 No 80 30 Which of the following lists the correct value of the test statistic and critical value? a. 7.98 (test statistic); 1.34 (critical value) b.…
According to a New York Times/CBS News poll conducted during June 24–28, 2011, 55% of the American adults polled said that owning a home is a very important part of the American Dream (The New York Times, June 30, 2011). Suppose this result was true for the population of all American adults in 2011. In a recent poll of 1780 American adults, 60% said that owning a home is a very important part of the American Dream. Perform a hypothesis test to determine whether it is reasonable to conclude that the percentage of all American adults who currently hold this opinion is higher than 55%. Use a 10% significance level, and use both the p-value and the critical-value approaches. Round your answers for the observed value of z and the critical value of z to two decimal places, and the p-value to four decimal places.zobserved =Enter you answer; z_observed p-value =Enter you answer; p-value Critical value =Enter you answer; Critical value
In 1942, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you on occasion consume, alcoholic beverages?" Of the 1100 adults surveyed, 440 indicated that they were total abstainers. In a recent survey, the same question was asked of 1100 adults and 418 indicated that they were total abstainers. Complete parts (a) and (b) below. C "1.M1 M2 Find the test statistic for this hypothesis test. 0.96 (Round to two decimal places as needed.) Determine the P-value for this hypothesis test. (Round to three decimal places as needed.)
An anger-management course claims that, after completing its seminar, participants will lose their tempers less often. Always a skeptic, you decide to test this claim. A random sample of 12 seminar participants is chosen, and these participants are asked to record the number of times that they lost their tempers in the two weeks prior to the course. After the course is over, the same participants are asked to record the number of times that they lost their tempers in the next two weeks. The following table lists the results of the survey. Using these data, test the claim at the 0.01 level of significance assuming that the population distribution of the paired differences is approximately normal. Let participants before completing the anger-management course be Population 1 and let participants after completing the anger-management course be Population 2. Number of Times Temper Was Lost during a Two-Week Period Before 10 6 8 10 6 3 10 3 8 After 6 7 4 4 8 6 4 9 3 7 Copy Data Step 2 of 3:…
A recent survey of 1030 U.S. adults selected at random showed that 627 consider the occupation of firefighter to have very great prestige. Estimate the probability (to the nearest hundredth) that a U.S. adult selected at random thinks the occupation of firefighter has very great prestige.
In statistics, the hypothesis that is formally tested by the data is the: Alternative hypothesis Null hypothesis
1. (Hypothesis Testing) Dr. Ayati claims that 90% of her students are satisfied with the data science course. Jose was not very satisfied, and he suspected the student evaluation is false. He surveyed a random sample of 80 of Dr. Ayati's students and found that only 80% were satisfied. He also run 1000 simulation, each simulating a sample of 80 students assuming there are 90% satisfied students. % of satisfied students Frequency 80 5 82.5 24 85 72 87.5 181 90 281 92.5 272 95 136 97.5 27 100 2 (a) What is the null hypothesis and alternative hypothesis Jose is testing? (b) According to the simulation, what is the probability of getting a sample with 80% satisfied students or less? (c) What should Jose conclude regarding the hypothesis?
Students in a Psychology Stats class gathered 1st and 2nd year university students to gather self-report data on UFO, sightings during the past year. A year later the same students took the survey after taking LSD. The results of the self-report survey are as follows: Participant ID UFO sightings UFO sightings before LSD after LSD 1 1 2 1 3 2 2 4 1 3 3 1 7 3 A) State the Null and Alternative Hypothesis. B) Find the calculated "t" value and the critical "t" value C) State weather to accept or reject the Null Hypothesis
Your statistics instructor claims that 60 percent of the students who take her Elementary Statistics class go through life feeling more enriched. For some reason that she can’t quite figure out, most people don’t believe her. You decide to check this out on your own. You randomly survey 64 of her past Elementary Statistics students and find that 34 feel more enriched as a result of her class. Now, what do you think? Solve the following problems using the steps in conducting hypothesis tests.

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