You suspect minority students are not as supportive of the new principal of a large school because of a few recent conflicts on campus. Yourandomly choose students and ask them if they think the principal is doing a good job. You find that 45 out of 56 white students and 21 outof 33 minority students surveyed support the principal.Show the mechanics of the test.Standard Error: type your answer...Z-Score: type your answer...P-Value: type your answer.....Previous44DELLD{Next

Let us consider two samples taken randomly Here, the proportion of the two samples is determined.…

Answered: You suspect minority students are not…

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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You and a friend are interested in knowing if two groups have the same proportion of smokers. The first group of n = 500 consist of 490 smokers. The second group of n = 500 has 400 smokers. The overall proportion of smokers in both groups is .89 (89%). You want to know whether the proportions of smokers are the same in the two groups of individuals. Based on a 95% confidence level, after hypothesis testing, what would you tell your friend? Would the null hypothesis reject H0 or fail to reject H0?
The first picture is the question and the second is the ones that I need help with . Thanks
A study investigated whether price affects people's judgment. Twenty people each tasted six cabernet sauvignon wines and rated how they liked them on a scale of 1 to 6. Prior to tasting each wine, participants were told the price of the wine. Of the six wines tasted, two were actually the same wine, but for one tasting the participant was told that the wine cost $10 per bottle and for the other tasting the participant was told that the wine cost $90 per bottle. The participants were randomly assigned either to taste the $90 wine first and the $10 wine second, or the $10 wine first and the $90 wine second. Differences were calculated by subtracting the rating for the tasting in which the participant thought the wine cost $10 from the rating for the tasting in which the participant thought the wine cost $90. Difference ($90 3 4 $10) 2 1 USE SALT 0 3 0 2 1 3 3 1 4 1 2 Find the test statistic. (Round your answer to two decimal places.) t = 2 1 -1 Carry out a hypothesis test to determine if…
Read the scenario below to determine which one of the three factors that influence reliability (instrument, group, test administration) is of most concern to the scenario. A, multiple-choice test is developed for use as an end-of-course examination. The students taking the end-of-course exam have very little experience with a multiple-choice exam. The students struggle to understand and complete the items in the allotted time period.
For this week, I would like you to explain the logic of one-sided and two-sided significance tests and the scientific advantage of using one or the other.
Matt E. Matic was applying for a job. To determine whether he could handle the job, the personnel manager sent him out to poll 100 people about their favorite types of TV shows. His data were as follows. 58 preferred comedies. 42 preferred variety shows. 45 preferred serious drama. 17 preferred comedies and variety programs. 11 preferred variety and serious drama. 17 preferred comedies and serious drama. 9 preferred all types. 5 did not like any of these TV show types. If you were the personnel manager, would you hire Matt on the basis of this survey? Why or why not? How many people did Matt ask?
The random varlable is the sum of the numbers on the dice. You roll three colored dice: Give the random variable r.v. =
Destiny wants to know whether gender predicts depressive symptoms in patients with heart disease. She assesses the number of depressive symptoms experienced by a large sample of patients and finds that the data on depressive symptoms are positively skewed. Which assumption of a single-sample z test has Destiny most likely violated?
A survey indicates that you should always try to negotiate for a better deal when shopping or paying for services. In fact, based on this survey, 30% of the people under the age of 34 were more likely to "haggle," compared to only 10% of those aged 65 and older. Suppose that this survey included 90 people under the age of 34 and 60 people who are 65 or older. (a) What are the values of Punder 34 and P65 or older for the two groups in this survey? under 34 P65 or over USE SALT = (b) Find a 95% confidence interval for the difference in the proportion of people who are more likely to "haggle" in the "under 34" versus "65 and older" age groups. (Round your answer to three decimal places.) to
A college professor conducted student evaluations at the end of a semester. One important question asked was, "Would you recommend this professor to a friend?” Fifty-four students responded using the following 1-to-5 rating scale. 1 = "absolutely not" 2 = "probably not” 3 = "no opinion" 4 = "probably yes" 5 = "absolutely yes" Student responses were recorded. "Blank" indicates that a student skipped this question on the evaluation. 4 #28: #1: Blank #10: #2: Blank #3: #4: Blank #5: #6: #7: #8: 4 #9: 5 4 5 2 # 11: #12: #13: #14: #15: # 16: #17: 3 Blank 5 Blank Blank 1 5 Blank # 19: #20: #21: #22: #23: #24: #25: #26: 4 #18: Blank #27: 1 2 #30: 1 #31: 3 Blank 5 #29: 5 Blank #32: #33: #34: #35: 1 #37: 5 Blank 4 1 5 4 5 #38: #39: #40: # 41: #42: #43: #44: #36: Blank #45: 2 #46: Blank 1 5 4 Blank #49: 5 #47: Blank #48: #50: #51: #52: Blank #53: 1 5 4 5 5 1 5 1 #54: Blank
Brown wants to conduct an assessment of where employees live and how employees work. Brown wanted to know if where you lived was related to how you worked. What hypothesis tests can be used in this case?
I need help with 2, 3 and 6.

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