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A sample from a population with μ = 40 and =σ10 has a mean of m = 44. if the sample mean corresponds to a z = 2.00, then how many scores are in the sample?
There are 20 qualified applicants for 5 trainee positions in a fast-food management program. How many different groups of trainees can be selected?
For the last 18 review periods the average sales figure has dropped to $11,500 with a standard deviation of $4,000. Management is concerned. Perform a hypothesis test to determine if this change in sales is a potential problem.
The quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of eight syringes taken from the batch. Assume the batch contains 1% defective syringes.
The probability that house sales will increase in the next 6 months is estimated to be 0.25. The probability that the interest rates on housing loans will go up in the same period is estimated to be 0.74. The probability that house sales or intere..
Using the .02 level of significance, conduct a five-step hypothesis testing procedure to determine if the new processes significantly reduced the wait time.
Determine what analysis would you do on each problem (ie, one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
Establish an approximate design to MTBF required for a system that will result in an approximate minimum total cost over a five year period if the system is to be operated 7500 hours per year
Hits on a personal web site occur quite infrequently. They occur randomly and independently with an average of five per week.
Can college conclude that students in new program are significantly different from rest of freshmen class? Use two - tailed test with a = 0.05.
At a 0.05 level of significance, does this data show that 2 year college students and private unversity students work an equivalent amount of time?
An experimenter is randomly sampling 5 objects in order from among 49 objects. What is the total number of samples in the sample space?
Create a 99% confidence interval for mean overall duration of symptoms in population of individuals who used zinc lozenges.
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