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1. To estimate the average time it takes to assemble a certain computer component, the industrial engineer at an electronic firm timed 40 technicians in the performance of this task, getting a mean of 12.73 minutes and a standard deviation of 2.06 minutes.
a. What can we say with 99 % confidence about the maximum error if x-bar = 12.73 is used as a point estimate of the actual average time required to do the job?
b. Use the given data to construct a 98 % confidence interval for the true average time it takes to assemble the computer component.
Is it reasonable for the manufacturer to claim that the drill bits will last 2.5 hours?
The grade point averages of 10 students are listed below. Find the median grade point average. 3.15, 3.62, 2.54, 2.81, 3.97, 1.85, 1.93, 2.63, 2.50, 2.80
What is the p-value and compute a 95% CI for the difference in means between the two groups?
Pick a random sample of 50 homes from the enclosed 90 cases. Double the asking price and selling price and use this data to develop three predictive models:
If random samples, each with n = 4 scores, are selected from a normal population with MK = 80 and o=10
Enter data into SPSS (use two columns: one for coding {0, 1, 2, 3, 4, 5} and one for DV)
For a normal population with u. = 80 and a = 20 which of the following samples is least likely to be obtained?
Create a mixed integer programming model for this problem.
Sampling area consisted of an area of 120m x 50m within site two and was bordered by a road on one side and a stream on another.
What is the probability that none can transact business in a foreign language?
In his wardrobe at home, a businessman has 7 suits and 8 ties. From those suits and ties he has on hand, he plans to take 3 of the 7 suits and 2 of the 8 ties with him to a conference in San Francisco.
The athletic director claims that the atendance is the same as last year. What is the test value needed to evaluate the claim?
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