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A production family employs 20 workers on the day shift, 15 worker on the swing shift, and 10 workers on the graveyard shift. A quality control of consultant is to select 6 of these workers for in-depth interviews. Suppose the selection is made in such a way that any particular group of6 workers has the same chance of being selected as does any other group
a) How many selections result in all 6 workers coming from the day shift? What is the probability that all 6 selected workers from the day shift?b) What is the probability that all 6 workers will from the same shift?c) What is the probability that at least two different shifts will be represented among the selected workers?d) What is the probability that at least one of the shifts will be unrepresented in the sample of workers?
Write a brief summary of the distribution of the area of homes.
Suppose that you are purchasing cases of wine and that periodically you select a test case to determine the adequacy of the bottles' seals. To do this you randomly select and test 3 bottles int he case.
Dogs were trained with urine samples from bladder cancer patients and people from a control group who did not have bladder cancer.
Scores by women on the SAT-I test are normally distributed with a mean of 998 and a standard deviation of 202. Scores by women on the ACT test are normally distributed with a mean of 20.9 and a standard deviation of 4.6.
Imagine you are the CEO of a local bank whose credit card holders engage in 1 billion credit card transactions per year; that the likelihood of a fraudulent transaction is 2%
What fraction of the calls last between 4.2 and 5 minutes?
A sample of n=20 has a mean of M=40. If the standard deviation is s=5, would a score of x=55 be considered an extreme value?
Use this information to construct a probability table, and then calculate each of the following probabilities: P(foreign car)
Suppose we estimate this model with OLS, and there is a correlation between unobserved student traits (in the error term) with attendance. How does this bias the coefficient of attendance?
Describe what do you mean by conditional probability. Give clinical example to support the explanation.
Reggie Miller of the Indiana Pacers is the National Basketball Association's best career free throw shooter, making 89% of his shots. Assume that late in a basketball game, Reggie Miller is fouled and is awarded two shots.
200 people were surveyed and asked to rate mayor Michael Bloombergs effectiveness towards education. The rate scale is 1 (lowest) to 10 (highest). Mayor Bloomberg's average rating was 7.50, with a standard deviation of 2
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