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. Two thousand randomly selected adults were asked whether or not they have ever shopped on the internet. The following table gives a twoway classification of the responses obtained. Have shopped Have never shopped Male 500 700
asked by David on June 11, 2013 
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Q1. A population has a mean of µ = 80 with σ = 20. a. If a single score is randomly selected from this population, how much distance, on average, should you find between the score and the population mean? 20 because the standard
asked by Jamie on May 27, 2014 
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Suppose you are interested in determining the probability that a college student will own a personal computer. You poll 8 of your classmates from randomly selected classes and find that 5 of them own their own computers. Find a
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Membership in Mensa requires an IQ score above 131.5. Nine candidates take an IQ test and their summary scores indicate that their mean IQ score is 133. IQ scores are normally distributed and have a mean of 100 and a standard
asked by Ms.L on November 6, 2014 
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5. Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6. a. What is the probability that a randomly selected exam will have a score of at least 71? b. What
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IQ scores in a certain population are normally distributed with a mean of 96 and a standard deviation of 12. (Give your answers correct to four decimal places.) (a) Find the probability that a randomly selected person will have an
asked by Tom613 on June 11, 2013 
Statistics
The probability that a randomly selected individual in a certain community has made an online purchase is 0.45. Suppose that a sample of 10 people from the community is selected, what is the probability that at most 3 of them has
asked by Sarah on June 2, 2013 
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Let the random variable X represent the number of people living in a household in a certain town. The standard deviation of X is 1.8. Which of the following statements is the best interpretation of the standard deviation? A.The
asked by Anonymous on February 3, 2020 
statistics
The data below are the final exam scores of 10 randomly selected statistics students and the number of hours they studied for the exam. Calculate the correlation coefficient r.
asked by milly on September 28, 2011 
Statistics
Please Help me understand how to work this problem. I have been working on this problem for several days and do not understand what to do. Suppose IQ scores were obtained from randomly selected twins. For 20 such pairs, of people
asked by Shannon on July 4, 2015
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