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A biologist considered studying the effects of various environmental pollutants on the health of mice by using a 27- 4fractional factorial design.
a. How many factors are involved? How many levels are there for each factor? How many trials will be required for a single replicate of the experiment? Can a test for lack of fit be obtained?
b. The biologist decided to augment the design with six center-point replicates. Can a test for lack of fit now be obtained? If so, can the biologist determine which factors caused a curvature effect?
The average service time at CheesePlate Restaurant is 3.5 minutes with a standard deviation of .04 minutes. A new order system claims it can improve service time
In a shipment of 79 vials, only 17 do not have hairline cracks. If you randomly select 3 vials from the shipment, what is the probability that all 3 of the selected vials have hairline cracks?
The probability that an airplane passenger misses his/her fight is only .05. A typical airplane has 100 seats. If all the tickets are sold: a) What is the probability that all the passengers make it to the flight?
a sample of alzheimers patients is tested to assess the amount of time in stage iv sleep. the number of minutes spent
When 40 people used the Weight Watchers diet for one year, their weight losses had a standard deviation of 4.9 lb (based on data from "Comparision of the Atkins, Ornish, Weight Watchers, abd Zone Diets for Weight Loss and Heart Disease Reduction, ..
Find the probability that Mary obtains exactly one Head and so does John. [Hint: We assume that Mary's tosses are completely independent from John's.]
your firm has 4 different manufacturing lines that each produce the same type of widget. there is a 95 percent chance
question suppose studies have shown that approximately 20 .2 of americans regularly engage in exercise at least 3 times
Seventy-five percent of households say they woud feel secure if they had $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings.
Look at the dataset. What design is it? What else do you notice and obtain the (appropriate) ANOVA table to be used in the analysis.
Carry out the Wilcoxon rank sum test. State hypotheses and give the rank sum W for high- progress readers, its P-value, and your conclusion. Do the t and Wilcoxon tests lead you to different conclusions?
Suppose we approximate the demand of a randomly selected ATM user by the Normal distribution
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