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Do teachers find their work rewarding and satisfying? An article reports the results of a survey of 398 elementary school teachers and 262 high school teachers. Of the elementary school teachers, 221 said they were very satisfied with their jobs, whereas 124 of the high school teachers were very satisfied with their work. Estimate the difference between the proportion of all elementary school teachers who are satisfied and all high school teachers who are satisfied by calculating a 95% CI. (Use pelementary - phigh school. Round your answers to four decimal places.)
twelve of the top 20 finishers in the 2009 pga championship at hazeltine national golf club in chaska minnesota used a
At a certain university, the average cost of books per student was 400.00 last semester. In a sample of 40 students this semsester, their average cost was 340.00 with a standard deviation of 80.00.
Convert the frequency distribution to a cumulative frequency distribution. Develop a cumulative frequency polygon. About 60 percent of the orders were filled in less than how many days?
How strong is the evidence against the company's claim? Based on these data, the P -value of the appropriate test
What is Optimal solution? Using Linear Programming or any other methods (Optional) Explain in Detail What does it mean "Optimal Solution"?
Entire batch will be rejected if at least one of those tested is defective. Determine the probability that entire batch will be rejected?
1. determine if this is an example of probability or statistics the average cost of groceries has risen by 4.2 in the
You are given the following frequency distribution for the number of errors 55 students made in a test:
salaries of 40 college graduates who took a statistics course in college have a mean of 62 200. assuming a standard
an auditor takes a random sample of size n110 from a large population. the population standard deviation is not known
Give an example of when the F-statistic would be a useful value in data analysis. Provide details of what you would measure and how the F-statistic would be used.
allstate would like to test the hypothesis that the average age of an imported car on the road is greater than the
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