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A new machine has just been installed to cut and rough-shape large slugs. The slugs are then transferred to a precision grinder. One critical measurement is the outside diameter. The quality-control inspector was instructed to select five slugs at random every half hour from the output of the new machine, measure the outside diameter, and record the results. The measurements (in millimeters) for the period from 8:00 a.m. to 10:30 a.m. follow. Use Microsoft Excel to design a mean chart and a range chart. Is the process in control or out of control?
Determine the range of values containing 50% of the population of x. From a large sampling (N>5000), we find that x has a mean value of 5.2 units and a standard deviation of 1.0 units.
A Variable has a mean of 100 and a standard deviation of 16. Four observations of this variable have a mean of 108 and a sample standard deviation of 12. Test whether the sample has been drawn from the population.
The number of sit-ups that a person can do in one minute, both before and after a physical fitness course was recorded. The data is shown below for 10 randomly selected participants.
Oxytocin is a naturally occurring brain chemical that is nicknamed the "love hormone" because it seems to play a role in the formation of social relationships such as mating pairs and child-parent bonding.
An entrepreneur owns two hotels, one in the western region of a certain state and the other in the eastern region. He thinks that the average amount spent by guests for lunch at his Friendly Café-West is less than $34.50
Describe a Bernoulli experiment and give two examples. What is the connection between a Bernoulli experiment and a binomial distribution? Explain.
Find out the crude death rate, age specific death rate, standard death rate and adjusted death rate.
The lengths of 225 fish caught in Lake Michigan had a mean of 15.0 inches. Assume that the population standard deviation is 2.5 inches.
Can you please explain a general strategy for factoring in a very organized way. Give an example if possible.
A single test on a certain device costs more than the entire lot. It is therefore decreed that not more than three tests will be performed per lot.
The dimension is supposed to be 224 mm and the variability of the manufacturing process is unknown. Is there evidence that the mean dimension is not 224 mm?
By using standard normal table, determine critical value (or values) for= 0.14 right-tailed test.
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