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Question: Industrial experiment. Engineers at a computer production plant tested two methods for accuracy in drilling holes into a PC board. They tested how fast they could set the drilling machine by running 10 boards at each of two different speeds. To assess the results, they measured the distance (in inches) from the center of a target on the board to the center of the hole. The data and summary statistics are shown in the table:
Write a report summarizing the findings of the experiment. Include appropriate visual and verbal displays of the distributions, and make a recommendation to the engineers if they are most interested in the accuracy of the method.
A sample of 45 overweight men participated in an exercise program. At the conclusion of the program 32 had lost weight. At the .05 significance level, can we conclude the program is effective?
Probability using normal distribution.Sampling distributions. Given a normal distribution with μ = 50 and standard deviation σ = 9, if a sample of n = 100 is selected.
An aptitude test has a mean of 220 and standard deviation of 10. find the corresponding z score for:
a study was conducted of 90 adult male patients following a new treatment for congestive heart failure. one of the
Present your graph and fully explain the information it is representing. Pose one question regarding the data and graph or chart for your fellow students to consider and respond to in your post.
In a random sample of 10 on-line statistics students, information was collected about their minutes studied and their chapter test scores. Is this relationship positive, negative or no relation?
Moving average forecasting models are powerful tools that help managers in making educated forecasting decisions. A moving average is mainly used to forecast short historical range data. This tool along with other forecasting tools is now computer..
what is the probability that student from this class will pass not fail?a 0.45b 0.60c 0.72d
A woman is pregnant with twin boys. Twins may be either identical or fraternal (nonidentical). In general, 1/3 of twins born are identical.
A survey covering 0 different suburbs in Dallas found the average price of gasoline to be $3.924 per gallon with a population standard deviation of $0.053. What critical value shoiuld be used to test the claim using a = 0.01?
in an experiment conducted by the mining engineering department at virginia tech to study a particular filtering
Let ρk = λk/μk and ρ = ρ1+ρ2+·· ·+ρK . In particular, show, as before, that the probability of n customers in the system is Qn = p(0, ... , 0)ρn/n! for 0 ≤ n ≤ m.
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