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Question: a. What is the purpose of the R chart?
b. What is a typical sample size?
c. How would you find the center line if you had no standard?
d. How would you find the center line if you did have a standard?
e. How would you find the control limits if you had no standard?
f. How would you find the control limits if you did have a standard?
Test at the 5% level of significance for the equality of the mean computational times of the four software packages.- Find a 95% confidence interval for the mean computational time using software package C.
How large a sample of elevator rails would you have to measure to ensure that you could estimate, with 95% confidence, the average diameter of an elevator rail.
For value 10,40,20,50 and 40, value of arithmetic mean is? Simplest measure of dispersion is the Standard deviation, variance, Quartile deviation.
a group of statistics students decided to conduct a survey at their university to find the average mean amount of time
For a Normally distributed statistic, how many standard deviations on either side of the mean do these alternative control limits lie?
The monthly utility bills are normally distributed with a mean value of $130 and a standard deviation of $15.
The current in a certain circuit as measured by an ammeter is a continuous random variable X with the following density function:
In a population of 500 tin plates, the number of plates with 0, 1, and 2 scratches is N0 = 190, N1 = 160, and N2 = 150.
Assume that a lot from product 5% non-conforming is submitted. Using Poisson Distribution compute the approximate probabilities that: the lot will be accepted and still in a reduced inspection.
Assume that these numbers are derived from two independent samples of 1,000 homeowners in each region. Test for equality of proportions of loan default in the two regions using α = 0.05.
Birth order revisited. Consider again the data on birth order and college majors in Exercise. What is the conditional distribution of majors for the oldest?
is the accounting system the same for a merchandising business and a service business?
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