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Question: In a simple regression the regression equation is Yˆ= 5X + 7. Now if we interchange the X and Y data (that is, what was originally X is now Y and vice versa) and repeat the regression, we would expect the slope of the new regression line to be exactly equal to 1/5 = 0.2. But the slope will only be approximately equal to 0.2 and almost never exactly equal to 0.2. Why?
Use the following equation for questions 1 and 2. (y + 5)2 = -12(x - 7) 1. Given the above equation of a parabola find the coordinates of the Vertex.
What is the difference between primary data and secondary data? Between internal secondary data and external secondary data?
An airline claims that the no-show rate for passengers is less than 5%. In a sample of 420 randomly selected reservations, 19 were no-shows. Use the z-test for proportions and test the airline's claim. Use a = 0.01. Solution:
Develop a single-sample plan for which AQL = .02 and LTPD = .07 in the case α = .05, ß = .10. Once values of n and c have been determined, calculate the achieved values of a and b for the plan.
suppose that the demand for a company s product in weeks 1 2 and 3 are each normally distributed and the mean demand
computing the z scores for the given data.a population consists of the following n 5 scores 0 6 4 3 and 12.1. compute
A minor league baseball executive has become concerned about the slow pace of games played in her league, fearing that it will lower attendance.
In an article entitled "Fuel Economy Calculations to Be Altered," James R. Healey indicated that the government planned to change how it calculates fuel economy for new cars and trucks.
he Bureau of Labor Statistics provides compensation information on and services for various positions. As of May 2008, the national average salary for an RN (registered nurse) was $65,130. Suppose the standard deviation is $9385. For a random sample ..
at parkview at any given time the probability that a randomly selected student is a female is 30. with this binomial
Discuss the problems of getting survey data in the real world, also discuss ethics you need to consider when gathering survey data. Also give an example of a real world product and give suitable survey questions
describe the wilcoxon ran-sum test. what type of hypotheses is it used to test? what assumptions are made for this
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