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X= % light absorption at 5800 A and y=peak voltage
x= 4.0, 8.7, 12.7, 19.1, 21.4, 24.6, 28.9, 29.8, 30.5y= 0.12, 0.28, 0.55, 0.68, 0.85, 1.02, 1.15, 1.34, 1.29
Give an estimate of the change in expected peak voltage with a 1% increase in light absorption. Estimate the expected value of peak voltage when % light absorption is 20.
Use a 0.01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury selection system appear to be fair?
In a sample of 12 bank tellers at a local branch office, the 7 tellers who have completed the advanced training program offered by the bank have a lower average error rate in the processing of transactions than the remaining 5 tellers.
As it is a 2 _ 2 table, try also two-tailed two-sample z test for ð1 = ð2 and verify that z2 is same as your chi-square statistic. Which test do you favour? Describe why?
What do you find out when you perform the nonparametric statistics?
he Department of Motor Vehicles (DMV) can service customers at a rate of 20 per hour (or 1/3 per minute) when it comes to license renewals. The service time follows an exponential distribution.
How many departments would they need to survey to achieve this level of accuracy with 95% confidence?
A large university says the mean number of classroom hours per week for full-time faculty is more than 9. A random sample of the number of classroom hours for full-time faculty for one week is listed.
A psychiatrist hires you to study whether her clients self-disclosed more while sitting in an easy chair or lying down on a couch. All clients had previously agreed to allow the sessions to be videotaped for research purposes.
if a gambler rolls a dice twice to get a sum of 10, he wins $10. and if he gets a sum of three, he wins $20. The cost to play the game is $5. What is the expectation of the game?
Use technology to find the estimated minium required sample size. The minimum sample size required is ? Computer users round to the nearest whole number. What is a major obstacle to getting a good estimate of the population mean?
What sample size would be required to obtain the error of ±10 square millimeters with 99 percent confidence?
Should the finite-population correction factor be used? Why or why not?
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