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8. The life span of a battery is normally distributed, with
8. The life span of a battery is normally distributed, with a mean of 2300 hours and a standard deviation of 50 hours. What percent of batteries have a life span that is more than 2365 hours? What per… read more
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This is the last set for tonight ... thank you ! 15. As the sample size increases (Points: 5) A)The confidence interval also increases (gets larger) B)The confidence interval decreases (gets smaller) … read more
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The expected value of an unbiased estimator is equal to the
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Statistics- Detail only needed on the H0, Ha questions. Tx
Question 1 Which of the following probability experiments would result in a discrete random variable? a. Observing the number of minutes required to walk a mile b. Observing the number of light bulbs … read more
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1. The standard deviation of all possible values is called
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7-1 C1 For the normal distribution, the mean plus and minus
7-1 C1 For the normal distribution, the mean plus and minus 1.96 standard deviations will include about what percent of the observations? A. 50% B. 99.7% C. 95% D. 68% 7-2 C2 What is the area under th… read more
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1. (TCO 6) In the standard normal distribution, the variance
1. (TCO 6) In the standard normal distribution, the variance is always (Points: 5) 0 1 2 none of these 2. (TCO 6) The area under a normal curve with mu = 15 and sigma = 2 is (Points: 5) 0 1 2 none of … read more
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Two events are complementary when A) the sum of their probabilities
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I have 10 question and would like someone to check my answers
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1.A medical researcher treats 100 subjects with high cholesterol
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1.In a normal distribution with mu 25 and sigma 9, what
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Suppose an actual census showed that 18.4% of the households
Suppose an actual census showed that 18.4% of the households in California have incomes in excess of $50,000. The probability that the sample proportion will be 0.22 or greater for a random sample of … read more
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1. Assume x is normally distributed with mean and standard
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2. An auditor for a large oil corporation has taken a random
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In a given year, the average annual salary of a NFL football
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1. Explain the difference between a discrete and a continuous
1. Explain the difference between a discrete and a continuous random variable. Give two examples of each type of random variable. 2. Determine whether each of the distributions given below represents … read more
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Given that z is a standard normal random variable and that
Given that z is a standard normal random variable and that the area to the right of z is 0.1949, then the value of z must be A) 0.51 B) -0.51 C) 0.86 D) -0.86 Consider an infinite population with a me… read more
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7.8 If x is normally distributed with 20.0 and s 4.0,
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