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It is common practice in many countries to destroy (shred) refrigerators at the end of their useful lives. In this process material from insulating foam may be released into the atmosphere. The article gave the following data on foam density (g/L) for each of two refrigerators produced by four different manufacturers:
1. 30.4, 29.2 2. 27.7, 27.13. 27.1, 24.8 4. 25.5, 28.8
Does it appear that true average foam density is not the same for all these manufacturers? Carry out an appropriate test of hypotheses by obtaining as much P-value information as possible, and summarize your analysis in an ANOVA table
Probabilities can be approximated by the normal probability distribution? Explain What is the probability of between 100 and 110 successes? What is the probability of 130 or more succeses?
Where is the flaw and how can it be fixed? If R^2 is taken as a model for the Euclidean plane, does this help resolve the difficulty? Explain.
While 290 out of 400 in Batavia preferred the same flavor. To test the hypothesis that there was no difference in preferences in the two towns, what is the alternate hypothesis?
keep your eyes and ears open as you read or listen to the news this week. finddiscover an example of statistics in the
A hospital human resources manager finds that the local average starting salary for nurses is $24,000. She randomly samples 10 nurse's salaries at the hospital and calculates a mean of $23,450 and a standard deviation of $400.
The theoretical probability of undesirable side effects resulting from taking Grebex is 2 in 19. If 570 people take Grebex to lower their blood pressure, how many will encounter undesirable side effects?
a company manufactures two products product a and product b. the wholesale price and manufacturing cost of each product
the thickness of wafers in semiconductor manufacturing has a mean of 10 micrometers and standard deviation of 0.8
Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour, and your city is the first stop on the tour.
Consider the relationship between yearly wine consumption (litres of alcohol from drinking wine per person) and yearly deaths from heart disease (deaths per 100,000 people) in 19 developed countries.
Draw a ball from number 1: if red go to number 2; if black go to number 3. What is probability
the diameter of the dot produced by a printer is normally distributed with a mean diameter of 0.002 inch. suppose that
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