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An automobile manufacturer obtains the microprocessors used to regulate fuel consumption in its automobiles from three microelectronic firms: A, B, and C. The quality-control department of the company has determined that 7% of the microprocessors produced by firm A are defective, 2% of those produced by firm B are defective, and 2.5% of those produced by firm C are defective. Firms A, B, and C supply 45%, 20%, and 35%, respectively, of the microprocessors used by the company. What is the probability that a randomly selected automobile manufactured by the company will have a defective microprocessor?
Assuming that these are a random sample of all publicly traded companies, construct a 95% confidence interval for the overall noncompliance proportion.
A typical problem statement is correlation research is _____________
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages.
Increasing the confidence-interval level from .95 to .99
Establish a 99% confidence interval for the difference in the proportion of suburban and urban housewives who own IPod.
Select the variable team salary and find the mean, median, and the standard deviation
Determine percent of the garages take between 29 hours and 34 hours to erect? Determine percent of garages take 28.7 hours or less to erect?
To test whether there is any association between two variables using Chi-Square test for independence.
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
A research analyst regresses the number of calls for service (Y) on the Fahrenheit temperature at 4:00 in the afternoon (X). The regression equation finds: Y = 62 + 2.4 X with an r 2 of .67
By constructing null and alternative hypotheses, computing critical values, and comparing test statistic to critical value.
Modify above problem (Problem 8th) so that each hardware vendor now demands seventy-five (75) units. Any units available from the vendors that are not shipped cost nothing.)
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