Mathematics, 12.08.2020 23:01, aliviafeidlerAlivia
Installation of a certain hardware takes random time with a standard deviation of 5 minutes.
(a) A computer technician installs this hardware on 64 different computers with an average installation time of 42 minutes. Compute a 95% confidence interval for the mean installation time.
(b) Suppose that the population mean installation time is 40 minutes. A technician installs the hardware on your PC. What is the probability that the installation time will be within the interval computed in (a)?
(c) A manager questions the assumption of the above. Her pilot sample of 40 installation times has a sample standard deviation of s = 6.2 min, and she says that it is significantly different from the assumed value of standard deviation = 5 min. Do you agree with the manager? Conduct a suitable test of a standard deviation.
Answers: 1
Mathematics, 22.06.2019 01:20, lauretta
Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18 }, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.
Answers: 2
Installation of a certain hardware takes random time with a standard deviation of 5 minutes.
(a) A...
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