Determine the interval estimate
A 95% confidence interval estimate for a population mean was computed to be (28.7, 40.9). Determine the mean of the sample, which was used to determine the interval estimate (show all work).
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A researcher is interested in determining the noise levels in decibels at area urban hospitals. She wants to be 98% confident that her estimate is correct.
In the manufacturing process a random sample of nine bolts manufactured has mean length of 3 inches with the variance of .09. Determine the 90% confidence interval for the true mean length of the bolt?
Suppose that the mean SAT score in Mathematics for 11th graders across the nation is 500, and that the standard deviation is 100 points. Find the probability that the mean SAT score for a randomly selected group of 150 11th graders is between 513
Suppose that the sample is drawn and z(?/2) = 1.96 and ? = 25. Answer the following questions: If Maximum Error of Estimate is 0.02 for this sample, what would be the sample size?
If only one client were using cardio circuit training section of gym, second line could be used as the backup for faulty equipment. Find revised probability of completing the workout uninterrupted?
A confidence interval estimate for the population mean is given to be (35.71, 44.14). If the standard deviation is 13.045 and the sample size is 52, answer each of the following (show all work):
By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 4.34 seconds.
In the nonproportional stratified the sample, the number of items studied in each stratum is disproportionate to their number in the popluation. We then weight the sample results according to the stratum's proportion of the total population.
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