20059.135 Kicking the cigarette habit. Can taking an antidepressantdrug help cigarette smokers kick their habit? The NewEngland Journal of Medicine (Oct. 23, 1997) published astudy in which 615 smokers (all of whom wanted to give upsmoking) were randomly assigned to receive either Zyban(an antidepressant) or a placebo (a dummy pill) for sixweeks. Of the 309 patients who received Zyban, 71 were notsmoking one year later. Of the 306 patients who received aplacebo, 37 were not smoking one year later. Conduct a testof hypothesis (at a =posed in the first sentence of this exercise.9.138.05) to answer the research question а.State the null and alternative hypotheses.b. Use Minitab to test the hypotheses. Report the test statistic and the p value.c. State your conclusion.

a. Null Hypothesis: H0: There is no difference in the proportions of not smoking one year later…

Answered: 9.135 Kicking the cigarette habit. Can…

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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Do men and women select different breakfasts? The breakfasts ordered by randomly selected men and women at a popular breakfast place is shown in Table 11.55. Conduct a test for homogeneity at a 5% level of significance. French Toast Pancakes Waffles Omelettes Men 47 35 28 53 Women 65 59 55 60
17.30 Hotel managers' personalities. Successful hotel man- agers must have personality characteristics tradition- ally stereotyped as feminine (such as "compassionate") as well as those traditionally stereotyped as masculine (such as "forceful"). The Bem Sex-Role Inventory (BSRI) is a personality test that gives separate ratings for “female" and "male" stereotypes, both on a scale of 1 to 7. Although the BSRI was developed at a time when these stereotypes were more pronounced, it is still widely used to assess personality types. Unfortunately, the ratings are often referred to as femininity and mas- culinity scores. A sample of 148 male general managers of three- star and four-star hotels had mean BSRI femininity score x = 5.29.6 The mean score for the general male population is u = 5.19. Do hotel managers, on the average, differ statistically significantly in femininity score from men in general? Assume that the standard is, the X%3D %3D
A simple random sample of size n = 200 drivers with a valid driver's license is asked if they drive an American-made automobile. Of the 200 drivers surveyed, 118 responded that they drive an American-made automobile. Determine if a majority of those with a valid driver's license drive an American-made automobile at the a = 0.05 level of significance. ..... What type of variable is "drive an American-made automobile, or not"? A. Qualitative with two possible outcomes B. Discrete C. Continuous…
A researcher uncovers that there is a significant interaction between the factor of marital status (i.e., married or non-married) and participant sex (i.e., male or female) regarding well-being among a sample with n = 4 participants in each condition. What would be the degrees of freedom for the simple main effect examining the difference in well-being between married men and women? a. df = 2, 12 b. df = 1, 14 c. df = 2, 14 d. df = 1, 12
1. Do social robots walk or roll? Refer to the International Conference on Social Robotics (Vol. 6414, 2010) study of the trend in the design of social robots, Exercise 2.1 (p. 26). Recall that in a random sample of 106 social (or service) robots designed to entertain, educate, and care for human users, 63 were built with legs only, 20 with wheels only, 8 with both legs and wheels, and 15 with neither legs nor wheels. One of the 106 social robots is randomly se- lected and the design (e.g., wheels only) is noted. a. List the simple events for this study. b. Assign reasonable probabilities to the simple events. c. What is the probability that the selected robot is designed with wheels? d. What is the probability that the selected robot is designed with legs? Toxic chemical incidents. Process Safety Progress (Sept. 2004) reported on an emergency response system for inci- dents involving toxic chemicals in Taiwan. The system has logged over 250 incidents since being implemented in 2000.…
Although an increasing share of Americans are reading e-books on tablets and smartphones rather than dedicated e-readers, print books continue to be much more popular than books in digital format (digital format includes both e-books and audio books). A Pew Research Center survey of 1502 adults nationwide conducted January 8-February 7, 2019, found that 1081 of those surveyed had read a book in either print or digital format in the preceding 12 months. (You may regard the 1081 adults in the survey who had read a book in the preceding 12 months as a random sample of readers.) Andrew Perrin, "One-in-five Americans now listen to audiobooks," September 25, 2019 at www.pewresearch.org/fact-tank/2019/09/25/one-in-five-americans- now-listen-to-audiobooks/. The sampling scheme was more complex than an SRS, so the computation of the number in the sample who have read in the preceding 12 months and acting as if it were an SRS is oversimplified Macmillan Learning STATE: What can you say with 95%…
The drug Finasteride is marketed as Propecia to help protect against male pattern baldness, and it also may protect against prostate cancer. A large sampleof healthy men over age 55 were randomly assigned to receive either a daily Finasteride pill or a placebo. The study lasted seven years and the men had annual check-ups and a biopsy at the end of the study. Prostate cancer was found in 804 of 4368 men taking Finasteride and in 1145 of the 4692 men taking a placebo. the 95% confidence interval for the risk difference is (-0.077, -0.043). Compared to this confidence interval, a 98% confidence interval for the risk difference is: a.) wider b.) there is not enough information provided to decide c.) half the width d.) the same width e.) narrower
Capsaicin content in red habanero chilli (Capsicum chinense Jacq.) is affected by the drying process. An experiment was conducted to determine the effect of using different drying temperatures (60 °C, 70 °C, and 80 °C) using an oven. Samples of red habanero chilli were procured. Upon checking, there were varying sizes of chilli and thus the experimenter grouped the samples according to size. Drying temperatures were then randomly assigned within each 8 hours. The capsaicin content was measured for each sample. The partial analysis of variance table is shown below: group for Source of Variation Fc p-value Size 2.1654 0.1560 Temperature 8.6013 0.0034 What is the maximum number of orthogonal contrasts that may be constructed for the post- hoc analysis of the effect of temperature? A. 0 В. 1 C. 2 D. 3
6.42 Evolution versus Creationism: A Gallup Poll released in December 2010 asked 1019 adults living in the Continental U.S. about their belief in the origin of humans. These results, along with results from a more comprehensive poll from 2001 (that we will assume to be exactly accurate), are summarized in the table below: Response Humans Evolved with God guiding (1) Year: 2010 Year: 2001 38% 37% Humans evolved but God had no part in the process (2) 16% 12% God created humans in present form (3) 40% 45% Other / No opinion (4) 6% 6% (a) State hypotheses for the following research question: have beliefs on the origin of human life changed since 2001? O Ho: the population follows the 2001 distribution Ha: the population follows the 2010 distribution O Ho: the population follows the 2001 distribution Ha: the population doesn't follow the 2001 distribution O the population follows the 2010 distribution Ha: the population doesn't follow the 2010 distribution (b/c) Calculate the actual number…
9.15 HPV infections in women. Human papillomavirus (HPV) infection is the most common sexually transmitted infection. Certain types of HPV can cause genital warts in both men and women and cervical cancer in women. The U.S. National Health and Nutrition Examination Survey (NHANES) contacted a representative sample of 1921 women between the ages of 14 and 59 years and asked them to provide a self-collected vaginal swab specimen. Of these specimens, 515 tested positive for HPV, indicating a current HPV infection. a. Give the probability, risk, and odds that a randomly selected American woman between the ages of 14 and 59 years has a current HPV infection. b. The survey broke down the data by age group: Age group (years) 14–19 20-24 25–29 30–39 40-49 50–59 Percent HPV positive 24.5 44.8 27.4 27.5 25.2 19.6 Give the risk and the odds of being HPV positive for women in each age group. Which age group has the highest risk, and has the highest odds, of testing positive for HPV?
6.41 Open source textbook: A professor using an open source introductory statistics book predicts that 60% of the students will purchase a hard copy of the book, 25% will print it out from the web, and 15% will read it online. At the end of the semester he asks his students to complete a survey where they indicate what format of the book they used. Of the 126 students, 71 said they bought a hard copy of the book, 30 said they printed it out from the web, and 25 said they read it online.(a) State the hypotheses for testing if the professor's predictions were inaccurate. Ho: pBuy = .6, pPrint=.25, pOnline=.15Ha: at least one of the claimed probabilities is different Ho: pBuy = .6, pPrint=.25, pOnline=.15Ha: at least one of the claimed probabilities is zero Ho: pBuy = .6, pPrint=.25, pOnline=.15Ha: all of the claimed probabilities are different Correct (b) How many students did the professor expect to buy the book, print the book, and read the book exclusively online? (please do not…
According to a Pew Research Center study, in May 2011, 33% of all American adults had a smart phone (one which the user can use to read email and surf the Internet). A communications professor at a university believes this percentage is higher among community college students. She selects 323 community college students at random and finds that 134 of them have a smart phone. In testing the hypotheses: Ho: p= 0.33 versus Ha: p > 0.33 Do the hypothesis test. Use a level of significance of a = 0.05; Use the unrounded values in Excel to find the answers for # 3 and #4. 1. I 4. Find the p-value.-- 5. The communication professor should the null hypothesis.

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9.135 Kicking the cigarette habit. Can taking an antidep drug help cigarette smokers kick their habit? The New England Journal of Medicine (Oct. 23, 1997) published a study in which 615 smokers (all of whom wanted to give up smoking) were randomly assigned to receive either Zyban