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A molding process uses a five-cavity mold for a part used in an automotive assembly. The wall thickness of the part is the critical quality characteristic. It has been suggested to use X-bar and Rcharts to monitor this process, and to use as the subgroup or sample all five parts that result from a single "shot" of the machine. What do you think of this sampling strategy? What impact does it have on the ability of the charts to detect assignable causes.
identify three situations where the measured output of a process has a small variation and three situations where the
the claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.30 and the sample
what results in your departments seem to be correlated or related to other activities? how could you verify this?
in measuring reaction time a human factors engineer estimates that the standard deviation is 0.20 second. how large a
The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute.
four different kinds of radar systems designed to detect or monitor the airspace around a major airport for high flying
a random sample of 5 homes in newberry florida had a mean of 169900 and a standard deviation of 21756. construct a 95
a quality control test has five equally likely outcomes - a b c d and e.a what is the probability of c occurring?b what
one hundred items are simultaneously put on a life test. suppose the life-times of the individual items are independent
a sample of 2 different calculators is randomly selected from a group containing 18 that are defective and 37 that have
Use a 0.05 significance level to test the claim that the mean speed of all cars is greater than the posted speed limit of 70 mph. Based on the above situation compute the value of the test statistic.
a firm wanted to see if there was a significant difference between two neighboring communities in terms of the mean
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