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A compute manufacturer is about to unveil a new,faster PC.The new PC is faster but intial tests incidcate there is more variation in the processing time. The processing time depends on the particluar program being run, the amount of input data and the amt of output. A sample of 16 computer runs,covering a range of production jobs, showed that the statdard deviation of the processing time was 22 hundredths of a second for the new machine and 12 hundredths of as second for the currents machine At the .05 significance level can we conclude that there is more variation in the processing time of the new machine
The researchers gave each subject a battery of nine separate neurological and psychological examinations designed to assess their mental capabilities.
Temperature in a certain city for the month of June follows a uniform distribution over the interval 61º F to 91º F. What is the probability that a randomly selected June day has a temperature that exceeds 70º F?
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.
What is the probability an applicant does not pass the test and is a sucessful manager?
Utilize this information to construct a probability table, and then calculate each of the given probabilities:P (female and domestic car).
Plot stem-and-leaf plot and boxplot for Mtotal. Illustrate hand calculation of median location and upper hinge location of boxplot, and determine their corresponding data values.
If it is determined that there is no difference between the population mean being represented by the sample and the mean of the population at large, then:
At the .05 significance level, can we conclude that the guideline is still reasonable?
For these 4 questions below what would be the independent and dependent variables, the level of measurement and whether or not the variable is discrete or continuous.
The response of the GSS question in 2006 about the number of hours daily spent watching TV, the responses by the seven subjects who identified themselves as Hindus were 2,3,2,1,0,1,4,3. find a point estimate of the population mean for Hindus. The ..
What are the differences among a proportion, a percentage, and a ratio? When would a researcher use a hypothesis test for the difference in two population proportions? Explain.
A doctor is doing research on the effects of medicine in a patience body. He randomly selects 10 patients that have been given a medication and records the number of days that have passed since they have taken the drug and concentration of the dru..
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