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Sample 1: n1=56, sumation xi,1=5,142, sumation x squared i,1=473,896sample 2: n2=27, sumation xi,2=2,415, sumation x sq. i,2=216,387Sample are independent from Normal populations with equal variances
a.Can you conclude that u1 is not equal to u2 at alpha=.05? State the hypothesis in orders of 1-2
b. construct a 99% confidence interval for the difference in true means. State the confidence interval in terms of 2-1
The sample mean of the sampling distribution of a statistic is 6 and the standard error of the statistic is 1.03. What is the probability that xbar > 7.52?
Compute mean yearly value using average gas prices by month found in "Final Project Data Set." Using years as your x-axis and annual mean as your y-axis, design scatterplot and linear regression line.
If you have multiple regression output with 2 independent variables and R-Square is .9682, what does R-Square indicate?
A loaf of bread is normally distributed with a mean of 22 oz. and a standard deviation of 0.5 oz. What is the probability that a loaf is less than 22.25 oz.?
Using data table given below, find out the range and median?
In the design of the robot to insert the small cylindrical part into a close-fitting circular hole, the robot arm must exert a 90-n force p on the part parallel to the axis of the hole as shown. Determine the components of the force which the part..
State the hypotheses for a right-tailed test.
If you were to roll a single die 10 times, the result of each roll would be __________. A) Mutually exclusive of the other nine rolls B) Proportional to the other nine rolls C) Dependent upon the other nine rolls D) Independent of the other nine roll..
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
What is the chi-square goodness-of-fit test? What are the differences/similarities between this test and an independent t-test? How do you know when to use one analysis over the other? Show an example.
One school found that 28.6% of all students are liberal. You wonder whether this percentage is different at your school, but don't know whether it's higher or lower. What hypotheses will you test to see if your school significantly differs from th..
Many believe that GM's demise could lead to a ripple effect and cause many other businesses to go under. This ripple effect, many think, could cause the United States to slip out of a recession and lead the country into a depression.
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