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Question
When we carry out a chi-square goodness-of-fit test for a normal distribution, the null hypothesis states that the populationA. does not have a normal distribution.
B. has a normal distribution.
C. has a chi-square distribution.
D. does not have a chi-square distribution.
E. has k − 3 degrees of freedom.
Answer
This answer is hidden. It contains 2 characters.
Related questions
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Data collected for a particular study are referred to as a data ____________.
A. variable
B. measurement
C. set
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Statistical ____________ refers to using a sample of measurements and making generalizations about the important aspects of a population.
A. sampling
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D. inference
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B. process
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D. D)census
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_____________ occurs when some population elements are excluded from the process of selecting the sample.
A. Non-response
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B. frames.
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A. dichotomous
B. free response
C. rating
D. All of the other answers are correct.
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When we are choosing a random sample and we do not place chosen units back into the population, we are
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B. sampling without replacement.
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Business analytics uses methods that are not part of traditional statistics to look at big data.
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Sampling error can occur because of incomplete information.
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A. expected monetary value
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A. utility
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The utility curve given below represents the preferences of a _________________ decision maker. A. risk-averse
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Q:
An automobile insurance company is in the process of reviewing its policies. The company is considering increasing the premium charged to drivers under 25. According to company records, 35 percent of the insured drivers are under the age of 25. The company records also show that 280 of the 700 insured drivers under the age of 25 have been involved in at least one automobile accident. On the other hand, only 130 of the 1,300 insured drivers 25 years or older have been involved in at least one automobile accident.
An accident has just been reported. What is the probability that the insured driver is under the age of 25?
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B. 20.5%
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Q:
Alternatives 1 and 2 in the following payoff table represent the two possible manufacturing strategies that the EKA manufacturing company can adopt. The level of demand affects the success of both strategies. The states of nature (SI) represent the levels of demand for the company products. S1, S2, and S3 characterize high, medium, and low demand, with probabilities of .3, .6, and .1, respectively. The payoff values are in thousands of dollars. The management believes that weather conditions significantly affect the level of demand. 48 monthly sales reports are randomly selected. These monthly sales reports show 15 months with high demand, 28 months with medium demand, and 5 months with low demand. 12 of the 15 months with high demand had favorable weather conditions. 14 of the 28 months with medium demand had favorable weather conditions. Only 1 of the 5 months with low demand had favorable weather conditions. The estimated probabilities of poor weather conditions given different levels of demand are presented below. What is the probability of high demand given that the weather conditions are poor?
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C. .1371
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Alternatives 1 and 2 in the following payoff table represent the two possible manufacturing strategies that the EKA manufacturing company can adopt. The level of demand affects the success of both strategies. The states of nature (Si) represent the levels of demand for the company products. S1, S2, and S3 characterize high, medium, and low demand, respectively. The payoff values are in thousands of dollars. The best alternative (course of action) for the EKA manufacturing company using the maximin criterion is strategy _____ and the best possible payoff is __________.
A. 1, $50,000
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B. uncertainty.
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A pharmaceutical company manufacturing flu test kits wants to determine the probability of a teenager not having the flu when the test results indicate that they do. It is estimated that the probability of positive test for flu among potential users of the kit is 10 percent. According to the company laboratory test results, 1 out of 100 noninfected teenagers tested as having the flu (false positive). On the other hand, 1 out of 200 teenagers with the flu tested as not having the active virus (false negative). A teenager has just used the flu test kit manufactured by the company and the results showed she has the flu. What is the probability that she does not have the flu?
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An automobile insurance company is in the process of reviewing its policies. The company is considering increasing the premium charged to drivers under 25. According to company records, 35 percent of the insured drivers are under the age of 25. Company records also show that 280 of the 700 insured drivers under the age of 25 have been involved in at least one automobile accident. On the other hand, only 130 of the 1300 insured drivers 25 years or older have been involved in at least one automobile accident.
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For eight randomly selected states, the following table lists the per capita beer consumption (in gallons) and the per capita wine consumption (in gallons).Beer Wine32.2 3.129.4 4.435.3 2.334.9 1.729.9 1.428.7 1.226.8 1.241.4 3.0Calculate the rank correlation coefficient when beer consumption = x, and wine consumption = y.A. rs = .506B. rs = .703C. rs = .711D. rs = .494
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A readability analysis is conducted to determine how easy four different newspapers are to read for the average citizen. The sample scores are below.A B C D50 59 45 6250 60 48 6453 63 51 6858 65 54 7059 67 55 72At the = .01 level of significance, test the claim that the four newspapers have the same readability level.A. Reject the null hypothesis.B. Do not reject the null hypothesis.
Q:
A readability analysis is conducted to determine how easy four different newspapers are to read for the average citizen. The sample scores are below.A B C D50 59 45 6250 60 48 6453 63 51 6858 65 54 7059 67 55 72Calculate H.A. 20.00B. 14.95C. 11.345D. 12.06