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An automatic hopper car loader is set to put 75 tons of coal into each car. The actual weights of coal loaded into each car vary according to normal distribution with mean 75 tons and standard deviation 0.8 ton.
A. What is the probability that the average load of 20 cars chosen at random will be less than 74.5 tons?
B. What is the probability that a car chosen at random will have less than 74.5 tons of coal?
fifty randomly selected ubc students were asked whether they prefer translinks new compass card bus pass over the
How many ways can she choose 4 dissimilar rides if order does not matter? If she has chosen the first weeks rides, how many ways can she choose four more different rides for second week? Suppose that order does not matter.
Does it seem prevention plans were effective in reducing mean amount of a claim? Use 0.05 level of significance. Set up Null and Alternate Hypothesis.
define the terms parameter and statistic be sure that the concepts of population and sample are included in the
Show your work (either your hand calculations or your statistical program output). You can either scan your work and submit it as a low-resolution graphic, type your answers directly into the document, or cut and paste your work into a Word file.
the scores on a certain test are normally distributed with a mean score of 45 and a standard deviation of 3. what is
Given below are heart volume measurements taken on male athletes. Do heart volumes differ for male athletes who participate in different sports?
Bruce Kuhlman, owner of Kuhlman Farms, wishes to use brand of fertilizer which will produce maximum yield per acre of wheat. Mr. Kuhlman can select from four different commercial brands. Write down the hypotheses?
Multiple comparison procedures are going to be done using the Bonferroni method with = 0.05. The value of t** is 2.4667. Which of the following is the appropriate conclusion from carrying out these multiple comparisons?
Suppose that, in a sample of 200, we observe 140 successes. Is this sufficient evidence at the 1% significance level to indicate the the population proportion of successes is greater than 65%
A sample of 500 respondents in a large metropolitan area was selected to study consumer behavior. Among the questions asked was "do you enjoy shopping for clothing?" Of 240 males, 136 answered yes.
What proportion of children 10-15 years would be classified as hyperlipidemia(assume that hyperlipidemia is defined as a total cholesterol level over 200)?
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