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Find the probability that the average temperature of 131 people will be greater than 36.9 degrees Celsius.
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On average a can of paint contains 10% of a checmical.how many cans of paint should the sample contain if the researcher wants to be 98% certain of being within 1% of the true proportion of this chemical?
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The tourist industry is subject to enormous seasonal variation. A hotel in North Queensland has recorded its occupancy rate for each quarter during the past 5 years. These data are shown in the accompanying table. Table 1: Occupancy rate Year 2004 2005 2006 2007 2008 Quarter 1 0.561...
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The Bottom Line Gift Boutique has been the target of many shoplifters in the past, but its newly installed camera security system has helped in the apprehension of 240 "sticky-fingered" customers in the last six months. A breakdown of these 240 shoplifters revealed the...
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think about a real-world situation or problem that could be addressed using a one-way analysis of variance. For this situation or problem, clearly state the independent and dependent variables you would study; generate the statistical null and alternative hypotheses; describe what information the...
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A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. At = .05, what is the test value? 6 Women Men Sample size 40 70 Mean...
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Q1:OF the plugs manufactured by TECH CO,3% are defective.In random selection of the plugs, find the probability that(a)exactly one will be defective(b)exactly two will be defective(c)at least one will be defective. Q2; 3 dice ,yellow,blue,and green are placed in a bag.A trial of selecting one...
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Calculate a 95% confidence interval for the average time spent in training per year at this firm.
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The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals
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An insurance company is thinking about offering discounts on its life insurance policies to nonsmokers. As part of its analysis it randomly selects 200 men who are 60 years old and asks them whether or not they smoke at least one pack of cigarettes per day and whether they have ever suffered from...
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- 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
- 2. What are the steps espoused by Applied Statistics in Business and Economics for formal hypothesis testing? Why is the sequence important?
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