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More on the film thickness process. Previously, control of the process was based on categorizing the thickness of each film inspected as satisfactory or not. Steady improvement in process quality has occurred, so that just 15 of the last 5000 films inspected were unsatisfactory.
(a) What type of control chart would be used in this setting, and what would be the control limits for a sample of 100 films?
(b) The chart in part (a) is of little practical value at current quality levels. Explain why.
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
you conducted a t-test in your capstone research. you did not find a statistically significant difference between your
individuals filing federal income tax returns prior to march 31 received an average refund of 1056. consifer the
What is the probability that this show will be cancelled if 13.4% of all viewing households are watching it? That is, what is the probability that a sample will lead to rejection of the null hypothesis?
an average american family spends 927 dollars on christmas gifts with standard deviation of 200.what is the probability
The manufacturer of a computer terminal reports in its advertising that the mean life of the terminal, under normal use, is 6 years, with a standard deviation of 1.4 years.
Determine whether the following situations represent a right, left or two-tailed test: In 1997, 43% of Americans 18 years or older participated in some form of charity work.
hours of television watched per day is 1.6 and a random sample of 225 Egyptians is selected, the mean of this sample belongs to a sampling distribution. What is the shape of this sampling distribution? Why?
the u.s. census bureau annual social amp economic supplement collects demographics concerning the number of people in
Find the z-score boundaries that separate a normal distribution as described in each of the following: the middle 20% from the 80% n the tails.
Assuming normal populations with equal standard deviations, use the 0.01 level in examining whether pulling the trailer uses significantly less fuel than driving with the rooftop carrier.
For the data used in given Exercise, which values would be declared outliers using the rule based on MAD?- Verify that the sample mean, 20% trimmed mean, and median are X‾ = 229.2, X‾t = 220.8 and M = 221.
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