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One of DotCom's products has a width dimensional specification of 1.488 ± .005 inches. The process is in statistical control and the dimension is known to be normally distributed with mean ?=1.491 and standard deviation ?=0.004. The plan is to recenter the process so that the mean equals the target value. Evaluate this plan by comparing the fall out before recentering and after recentering. Fall out is the fraction of products that don't fall within specs.
Draw a sketch of the standard normal distribution curves, one for the current process and another one for the recentered process. Label the spec limits and shade the area of the curve that corresponds to your answer.
a man and a woman make an appointment to meet between 5 p.m and 6 p.m at a certain location and they agree that
What is the difference between the null and alternative hypothesis statements in one tailed and two tailed tests? How can manufacturing companies use the standard normal distribution to determine quality control of their products?
question a bacteria culture starts with 500 bacteria and grows at a rate proportional to its size. after 3 hours there
Is there sufficient evidence to conclude that a difference exists between the proportions of cats and dogs that sleep more than 10 hours per day?
In addition, the cruise line has decided to plan for an additional 25% more meals than bookings. Formulate the appropriate linear program (Constraints and Objective Function only)
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
Different methods - a traditional method, and a web-based self-paced method. Can he conclude, at α = .05, that the test scores in the web-based self-paced method are lower?
Many educators feel their grades should fit a normal distribution and often apply curves to make them fit one. One way to do this is to convert numeric grades to z scores using the mean and standard deviation for the grades, then use an equation s..
the american college of cardiologists claims that the mean number of grams of fat in the popular m.i. burger sold at
A standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs. The df for determining tcrit
Among the half that had surgery, 80% showed improvement after three months, but only 54% of those who used the wrist splints improved. what's the standard error of the difference in the two proportions?
A sample of 84 golfers showed that their average score on a particular golf course was 89.05 with a standard deviation of 3.47.
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