Math 221 Quiz Review for Weeks 3 and 4 1. State whether the variable is discrete or continuous. The # of keys on each student’s key chain. 2. Decide whether the experiment is a binomial experiment. Explain why by citing the properties of binomial experiments. Testing a pain reliever using 20 people to determine if it is effective. The random variable represents the number of people who find the pain reliever to be effective. 3. Use the binomial probability distribution to answer the following
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Prepare a managerial report for the dean of the college that summarizes your assessment of the nature of cheating by business students at Bayview University. Be sure to include the following questions. 1. Develop 95% confidence intervals for the proportion of all students‚ the proportion of male students‚ and the proportion of female students who were involved in some type of cheating. 2. Conduct a hypothesis test to determine if the proportion of business students at Bayview University who were
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Note: When you answer questions involving the test of hypotheses‚ use the four-step hypothesis process (see textbook pages 298-299). Also‚ see your textbook for the full question when necessary; the chapter 9 problems start on p. 303 Chapter 9‚ problems 4‚ 12‚ 14‚ 22 4. Explain why t distributions tend to be flatter and more spread out than the normal distribution. 12. Last fall‚ a sample of n = 36 freshmen was selected to participate in a new 4-hour training program designed to improve
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1. Question : Employees of a local university have been classified according to gender and job type. If an employee is selected at random what is the probability that the employee is male? Answer: .667 2. Question : Employees of a local university have been classified according to gender and job type. If an employee is selected at random what is the probability that the employee is female given that the employee is a salaried member of staff? Answer:
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e-Business Plan: Competitor Analysis Every business has competition and prospective business owners ignore competitors at their peril. Unless a business has an absolute monopoly on a life-essential product‚ there will be competitors offering alternative and substitute products and services. That level of competition is revealed in the competitor analysis section of your e-business plan. A competitor analysis is an important requirement in any business plan because it (a) reveals the firm’s competitive
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Question1: Frequency Distribution. Histograms‚ Cumulative Frequency and Ogives. 1) a) 799 b) 1000 c) 900+9992 = 949.5 d) Lower Class Boundary=1100-0.5 =1099.5 Upper Class Boundary=1199.5+0.5=1199.5 e) 100 f) 76 g) 62400×100=15.5 h) 600-699‚ the fourth class has the largest frequency of 76. i)14+46+58400 ×100=29.5% j) 48+22+6400 ×100=19.0% k) 4002=200 200 lie in the fifth class interval 700-799 ∴The median lies in this interval. =l+n2-cff×h =700+200-19468×99 =708.735 l)
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In the 21st Century the number of women enrolling in higher education institutions is surpassing the numbers of men enrolled. The graduation rates of women from high school and higher education are most often higher than for men. The number of women graduates from most professional occupations‚ including higher paying medicine‚ law and business‚ will exceed the number of men graduates in the near future. In numerous occupational areas with a majority of women graduates‚ salaries already surpass salaries
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Name: ____________ Date: ______________________________________________________________________________ □ EXERCISE 31 1. What are the two groups whose results are reflected by the t ratios in Tables 2 and 3? The two groups with results on the effects on cardiovascular risk factors and the programs effective on health behavior have paid t-ratios 2. Which t ratio in Table 2 represents the greatest relative or standardized difference between the pretest
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2-26. Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 100 disks are summarized here: Scratch Resistance Shock Resistance High Low High 70 9 Low 16 5 Let A denote the event that a disk has high shock resistance‚ and let B denote the event that a disk has high scratch resistance. Determine the number of disks in A B‚ A‚ and A B. A B = 70‚ A= {9+5}= 14‚ A B ={70+16+9}= 95 2-86. Strands of copper wire from
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Although Douglass was speaking to a diverse audience‚ it was more to show slave owners the life of being a slave by using rhetorical strategies. In Douglass’ story “What to a Slave is the Fourth of July”‚ he was trying to give all slaves a voice. Obviously‚ this did not end slavery entirely but it did help the fight. What Douglass achieved in this story was giving a voice for slaves without physically protesting. Throughout the story‚ he told stories of his fellow slaves being burned alive and
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