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Two semiconductor factories are being compared to see if there is a difference in the average defect rates of the chips they produce. In the first factory, 250 chips are sampled. In the second factory, 350 chips are sampled. The proportions of defective chips are 4.0% and 6.0%, respectively.
A bacteria culture initially contains 2000 bacteria and doubles every half hour. Find the size of the baterial population after 40 minutes. Find the size of the baterial population after 7 hours.
A vertical line is drawn through a normal distribution at z = -0.25, and separates the distribution into two sections. What proportion of the distribution is in the larger section?
one article describes measurements of ammonium concentrations in mgl at a large number of wells in the state of iowa.
salvage value and goodwill cost can be important components of an inventory problem. how do they fit into the process
Fifty samples of size 600 were drawn from a manufacturing process and the number of defectives in each sample was counted.
mr. cotton has to give a lecture at 330. from past experience we know that mr. cotton will arrive from 1 minute early
With the sample standard deviation of 12 lbs. Determine the 90% confidence interval of true mean weight of all college wrestlers.
future electronics makes cd players. its research department found that the life of the laser beam device is normally
Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the shortest distance.
Critically discuss some concepts behind variance analysis? Why is it important to test for variances in your data? Explain. How is variance analysis used in health care administration?
How many commuters must be randomly selected to estimate the mean driving times of Chicago commuters? If we want 99% confidence that the sample mean is within 2 minutes of the population mean, and the population standard deviation is known to be 1..
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate u and standard deviation in the formula for the normal approximation to the binomial
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