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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
If you had a research problem appropriate for ANOVA and it was based on the results from three samples, what would be the null hypothesis?
Complete the test at the 5% level of significance.
A marketing firm asked a random set of married and single men as to how much they were willing to spend for a vacation. At = .05, is a difference in the two amounts?
A shipment of crankshafts is believed to be defective. A simple random sample of 16 is drawn from a large shipment. Check to see if the sample is any different from the assumed population mean of 224.
P-value for test statistic is .085, determine the minimum level of significance needed to reject null hypothesis?
A survey of undergraduate students in the School of Business at Northern University revealed the following regarding the gender and majors of the students:
The author collected data consisting of the month of birth of actors who won Oscars. Use a 0.05 significance level to test the claim that Oscar winning actors are born in different months with the same frequency.
Compute the 95% confidence interval around the mean of each of the three groups and plot the confidence interval in the space provided above.
A. What is the coefficient of determination? B. What is the correlation coefficient? C. What is the sampl mean of Y?
Oxytocin is a naturally occurring brain chemical that is nicknamed the "love hormone" because it seems to play a role in the formation of social relationships such as mating pairs and child-parent bonding.
At the 5% significance level, if the sample proportion is .45, and the standard error of the sample proportion is .035, the appropriate conclusion would be:
An old saying in golf is "you drive for show and you putt for dough." The point is that good putting is more important than long driving for shooting low scores and hence winning money.
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