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A human resource manager for Carver County is evaluating a recent effort to improve the health of the county's firefighters by providing an exercise room in each of the county's firehouses. Their records prior to installing the exercise rooms indicate that the mean weight of all county firefighters is 198 pounds with a standard deviation of 13 pounds. A random sample of 40 firefighters taken six months after the program was implemented revealed that the mean of the sample was 192 pounds.
Construct a 96% confidence interval for the mean weight of all firefighters six months after the exercise rooms were installed.
Assume that σ has not changed. Does it appear that the program is working?
Any value which is based on having measured a sample is called:
The student with the 92 found a grading error on her exam and her correct grade was 95. There were no other grading errors. After correcting this student's paper, the five number summary for the midterm exam will be
What is the probability that a randomly selected automobile manufactured by the company will have a defective microprocessor?
Is there any evidence that the different teatments produced different responses? If so, which one seems to work best?
Design a Linear programming problem for the flair Furniture Company and find the combination of tables and chairs that the company must produce to maximize profits.
In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be:
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
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Determining the probability that the two choose the same number?
Find out the forecast value utilizing three month moving average method, weighted moving average method, exponential smoothing and regression methods.
Can you conclude that the information in the article is untrue? Use the 0.05 significance level. Determine the p-value and explain its meaning.
Determine 80% confidence interval for average weights of Allen's hummingbirds in study regions. Determine the margin of error?
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