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A biologist considered studying the effects of various environmental pollutants on the health of mice by using a 27- 4 fractional 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?
according to an irs study it takes a mean time of 330 minutes for taxpayers to prepare copy and electronically transfer
Cars pass a certain street location according to a Poisson process with rate λ. A woman who want to cross the street at that location waits until she can see that no cars will come by in the next T time units.
A gardener grow 20 of these plants and was pleasantly suprised to see 5 blue flowers, 10 red, 2 white and 2 pink. Calculated the probability of this event.
The one time fling. Have you ever bought the article of clothing (dress, sports jacket, etc.) worn item once to a party, and then returned purchase?
Ordinary regression line where the spread is assumed to be constant in all parts of the line. In practice, plot yi vs. xi from the sample and see what type of relation exists. When can a ratio estimator be used?
determine the probability that at least 2 people in a room of 11 people share the same birthday ignoring leap years and
the waiting times in minutes for 11 customers at a supermarket are 13951547911142 and 6. determine the approximate
In the graphical method, how do you know when a problem is infeasible, unbounded, or when it has multiple optimal solutions? Give a real-world example of when you could have an infeasible problem.
What is the probability of randomly selecting a sample of 50 one bedroom apartments in this town and getting a sample mean of less then $530 if the population standard deviation is $100?
a small business just leased a new computer and color laser printer for three years. the service contract for the
A recent of minimum wage earners found that 27% of them are 16 to 24 years old. Suppose a random sample of 500 minimum wage earners is selected. What is the probability that at most 150 of them are 16 to 24 years old? Use the normal curve approxim..
Inventories represent a considerable investment for every organization; thus, it is important that they be managed well. Excess inventories can indicate poor financial and operational management.
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