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Computer Services, Inc. wants to determine a confidence interval for the average CPU time of their teleprocessing transactions. A sample of 64 transactions yielded a mean of 6 seconds with a standard deviation of 0.8 seconds. Determine a 98% confidence interval for the average CPU time.
A population of 1000 students spends an average of $10.50 a day on dinner. The standard deviation of the expenditure is $3. A simple random sample of 64 students is taken.
The quality control process at a manufacturing plant requires that each lot of finished units be sampled for defective items. Twenty units from each lot are inspected.
Considering all of the day to day activities you are engaged in at work and in your personal lives, write a 200 (or more) word paper that describes at least three (3) different statistical usages that you see regularly.
Solve problem graphically1. Describe optimal solution and objective function value in context of the problem.
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
Over a period of years, toothpaste has received a mean rating of 5.9, on a 7-point scale, for overall customer satisfaction with the product.
Mmaximum error of estimate was 30. if he were to conduct a second study to reduce the maximum error of estimate to 6, about how many hard drives.
What is the value of z score required for a 70% confidence interval?
the number of students visiting their professor during office hours each day has a poisson distribution with average
State the appropriate null and alternative hypothesis for testing the standard regarding the mean value. Test the hypothesis using a significance level equal to 0.05. What assumption will be required?
A survey of n = 703 randomly selected workers showed that 61% of those respondents found their jobs through networking.
The formal addition rule expressed the probability of a or b as follows: p(a or b) =p(a)+p(b)-p(a and b). Rewrite the expression for p(a or b) assuming that the addition rule uses the exclusive or instead of the inclusive or (recall that the exclusiv..
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