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In a manufacturing process a random sample of 36 bolts manufactured has a mean length of 1.71 inches with a standard deviation of .08 inches. What is the 90% confidence interval for the true mean length of the bolt?
question thompson photo works purchased several new highly sophisticated machines. the production department needed
(A) What sums are needed to calculate a correlation coefficient? (B) What are the two ways of testing a correlation coefficient for significance?
I'm trying to determine what happens to the sample size if the level of confidence is reduced from 95% to 90% but the allowable error and the standard deviation remain
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.
A die has half of the faces red and the other half black. The die is rolled 3 times. Let the random variable X represent the number of black outcomes out of three rolls. What is P(1) that is the probability if exactly one black outcome out of three r..
a vertical line is drawn through a normal distribution at z -1.00. the line separates the distribution into two
Describe why ordinary least squares solution is not unique. What can you say about residuals of any solution? Is ridge regression solution unique? Explain why or why not?
Airplaneflight during the last year. If we take a random sample of 40 adults, the probability is 0.37 that the sample proportion is greater than what number.
The newspaper has charged that your police department responds more slowly to 911 calls in poor neighborhoods than in more wealthy ones.
Create a flow diagram for entire process. Include flow paths for students (solid lines) and prescriptions (dashed lines).
Find out the slope, b, and the intercept, a, for the least-squares line. Write the equation of the least squares line.
Use a 0.05 significance level to test the claim that these credit rating are from a population with a mean that is equal to 700.
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