Estimate the sample size
Estimate the sample size that is needed to estimate the true proportion of blue-eyed North Island college students if you want your estimate to be in 0.04 with a 90% confidence.
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The probability that a certain machine will produce a defective item is 0.20. If a random sample of 6 items is taken from the output of the machine, what is the probability that there will be 5 or more defectives in the sample?
The number of bacteria in a drop of water from a lake has Poisson distribution with average of 0.5 bacteria/drop. A small dish containing four drops of water form the lake is placed under a microscope.
The lifetime of the flashlight battery is basically distributed about mean of 35.6 hr with standard deviation of 5.4 hr. Kevin chosen one of these batteries at random as well as tested it. Determine the probability that this one battery will last
The mean and standard deviation on the last test in Professor McIsaac history test were 75 and 8 respectively. Professor McIsaac though the scores were too high.
Suppose that a sample is drawn and z(?/2) = 1.96 and ? = 15. Answer the following questions: If the Maximum Error of Estimate is 0.04 for this sample, what would be the sample size?
Suppose that the mean score on certain aptitude test across the nation is 100, and that standard deviation is 20 points. Find out the probability that the mean aptitude test score for randomly selected group of 150 8th graders is between 101.5 and
You found the mean to be 125 vehicles per minute with standard deviation of 32. Compute the 99% confidence interval for the population mean
By measuring the amount of time it takes component of product to move from one workstation to next, an engineer has estimated that the standard deviation is 3.22 seconds.
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