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A scatter diagram includes the data points (x = 3, y = 8), (x = 5, y = 18), (x = 7, y = 30), and (x = 9, y = 32). Two regression lines are proposed: (1) , and (2) y^= -2 4x.
Using the leastsquares criterion, which of these regression lines is the better fit to the data? Why?
a random sample of 100 adults was selected. 80 adults in the sample said they were non-smokers1. what conditions must
Determine the failure rate and the reliability. Find the probability that the machine operates for at least 12 hours before breaking down.
Use a data to obtain 95% confidence interval using your formula from Number 7. Does your interval contain the correct value?
Find a 99% confidence interval for mu1-mu2, the difference in population means when it is known in advance that the population variances are 4 and 5 respectively.
Pollsters attempt to find out whether or not person is a "likely voter" before they count their opinion in poll. If we suppose 40% of registered voters will really vote.
Ccompute a t-test comparing males' and females' heights. You must determine which type of t-test to compute. Write a short interpretation of the results.
Describe your answer to a person who has never had a course in statistics.
Which regression method would you use and why? What would the output tell you about the relationship between the variables and what would R2 and adjusted R2 tell you about the relationship between the variables?
Linda would like to maintain a 90% service level. what safety stock level do you recommend for BX-5?
a regional track championship has decided that they will invite the fastest 15 of runners in their region runners with
Hypothesis test of difference between two means based on independent random samples, which one of the given is correct rejection region at significance level of .05?
Solution to managerian stastics question. suppose that a consultant for the supermarket counts the number of arrival per hour during a sample of 150 hour.
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