new concept in the text that requires a brief explanation. A key to understanding the t test is to recall an essential component of a Z test; namely, that a Z test is used when the population variance is known. Also, the shape of the population distribution follows a normal, symetrical curve where the left and right side of the curve are the same. Likewise, the Z tables provide exact percentages of the curve for each Z score. Unlike a Z test that is used when the population variance is known, the
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If the cholesterol level of healthy men is normally distributed with a mean of 180 and a standard deviation of 20, and men with cholesterol levels over 225 are diagnosed as not healthy, what is the probability of a type one error? z=(225-180)/20=2.25; the corresponding tail area is .0122, which is the probability of a type I error. If the cholesterol level of healthy men is normally distributed with a mean of 180 and a standard deviation of 20, at what level (in excess of 180) should men be diagnosed
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THE MATRIX OF POWER CHALLENGES Solution clues - By ILO FAUSTINUS CHINEDU Power transformation – a review: Recently, the Minister of Power, Prof. Chinedu Nebo, recounted with deep regrets the confession of an apprehended hoodlum at Mmakor which reads thus: “This is a community without power, a community government have taken transformer to and this is a community Where the youths stole the transformer, melted millions of naira worth of equipment and sold it for N45,000”, (Nigerian Pilot, October
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who is a girl or boy. (b) (2.5 points) Given that we select a random person who survived, what is the probability of getting boy? (c) (2 points) Suppose that boys who survived, went for cruise at the rate of six per year. Using the Poisson distribution, what would be the mean and standard deviation of the number of boys who survived and went for a cruise in six years? 2. It is found that Viagra users experience headaches with probability 0.15. Suppose we have a group of 105 Viagra users and
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Central limit theorem: Sample mean A soft drink company has recently received customer complaints about its one-liter-sized soft drink products. Customers have been claiming that the one-liter-sized products contain less than one liter of soft drink. The company has decided to investigate the problem. According to the company records, when there is no malfunctioning in the beverage dispensing unit, the bottles contain liters of beverage on average, with a standard deviation of liters. A sample of
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teSTUDENTS CAN REDUCE EXAM STRESS When studying for exams students are normally under a lot of pressure and commonly confonted with exam stress. Exam period is extremly stressful for many students and some of them are so stressed that they undeperfom, but this doesn't occur because the lack of their abilities but because they have to cope with high level of exam stress. They are under a pressure of possible failure, or unsuccess which results in underperformance. CAUSES OF EXAM STRESS Exam stress
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Chapter 2/Fundamental Economic Concepts Chapter 2 Fundamental Economic Concepts Solutions to Exercises 1. The number of checked bags should fall, as individuals internalize the external cost of added weight. However, the average weight should rise, as those checking bags would in all likelihood pack as much as possible to make up for the cost. 2. The wage in the market for oil spill cleanup efforts should rise, thanks to an increase in demand for labor. The wage in the market for similarly-skilled
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top 1% and the bottom 99%. According to the Institute for Policy Studies, in September 2012 over 60% of the Forbes richest 400 Americans grew up in substantial privilege. A remarkable study reveals that Americans have no idea that the wealth distribution is as concentrated as it is, Norton and Ariely (2010). It is clear to say that the elites are a modern societies of large bureaucratically structured organizations (corporate, nonprofit, or governmental). One of the theories
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MAT 300 – Assignments and Rubrics ALEKS Pie Completion Worth 400 points The primary goal of this class is for you to complete the entire pie by the end of the term. Points for pie completion will be added to your score at the end of the term. ALEKS Emphasis on Lab Work. On-ground sections of the course will be taught in a computer lab, with three (3) hours of lab time using ALEKS for every one (1) hour of traditional instruction. Thus, students in an onground section of the course will log
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Name: Kelsey Dionne Chapter 1 Instructions Practice Problem 12, 15, 21, & 22 Due Week 1 Day 6 (Sunday) Follow the instructions below to submit your answers for Chapter 1 Practice Problem 12, 15, 21, & 22. 1. Save Chapter 1 Instructions to your computer. 2. Type your answers into the shaded boxes below. The boxes will expand as you type your answers. 3. Each shaded box is worth 1 point unless otherwise noted; thus, 28 points total for Chapter 1. 4. Resave this form
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