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Find another area of research. Decide what n you can afford. What is the purpose of Design of Experiments? To find out what causes our responses in the fewest possible experiments. We run an experimental design with four factors -- Temperature, Pressure, Speed, and Processing Time. Our analysis table gives a p-value of 0.01 for Pressure -- all other effects have large pvalues -- larger than 0.25. What does this all mean?
A single plant operates three galvanizing lines that are assumed to operate independently. What is the probability that none of the lines experiences a surface finish problem in 40 hours of operation.
suppose that 80 of the accounts are in error. What is the probability that the auditor will find that the sample proportion (P) of the accounts in error will exceedd 0.10?
Utilize a test of the difference among proportions when answering these questions. Illustrate the research hypothesis.
Independent random samples taken on two university campuses revealed the following information concerning the average amount of money spent on textbooks during the fall semester.
A chi-square test for goodness of fit is used to test whether or not there are any preferences among 3 brands of cola.
The probability that a randomly selected elementary or secondary school teacher from a city is female is 0.68, holds a second job is 0.38, and is female and holds a second job is 0.29.
Lab technicians at a major mdical lab can process an average of 400 blood samples a day with a standard deviation of 50 samples. The processing follows a normal distribution.
Over the last year the absentee rate at a large corporation averaged 8.2 days absent with a standard deviation of 6 days. One department with 40 employees had an absentee rate of 12 days per employee.
In order to control costs, a company wishes to study the amount of money its sales force spends entertaining clients. The following is a random sample of six entertainment expenses (dinner costs for four people) from expense reports submitted by m..
What percentage of architects have Z scores (a) above .10, (b) below .10, (c) above .20, (d) below .20, (e) above 1.10, (f) below 1.10, (g) above -.10, and (h) below -.10?
If 300 stolen cars are randomly selected, what is the mean and standard deviation of the number of cars recovered after being stolen?
Compare a tabular cum sum chart using standardized values h = 5 and k = 1/2. What is the information you learn.
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