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Question: Grades. Two different professors teach an introductory Statistics course. The table shows the distribution of final grades they reported. We wonder whether one of these professors is an easier grader.
Prof. Alpha Prof. Beta
A 3 9
B 11 12
C 14 8
D 9 2
F 3 1
a) Will you test goodness-of-fit, homogeneity, or independence?
b) Write appropriate null hypotheses.
c) Find the expected counts for each cell, and explain why the chi-square procedures are not appropriate for this table.
What should be considered a relatively high price per share? What percentage of the companies has a price per share in this range? Which companies have a price per share in this range, and what is the price per share for each?
If an assumption of Normality is justified, use the 68-95-99.7 Rule to describe how many students in the freshman class might have right-brain language control.
if you had the chance to set up a simple experiment at your workplace to test a hypothesis would you have your research
Prove d/dt(u(x(t),t))+tanh(x(t))(d/dx(u(x(t),t)))=0 u(x(t),0)=a(x(t)) limit as x tends to infinity of u(x,t)=0 has at most one solution.Explain why there is no boundary condition at x=0 and find a solution for the special case a(x(t))=sinh(x(t))
Can you reject the owner's claim at alpha = 0.01? Check conditions before you perform the test. Use Minitab>stat>basic stat> 1-sample t to get the p-value and then use p-value approach.
Suppose the annual employer 401(k) cost per participant is normally distributed with a standard deviation of $625, but the mean is unknown.
Derive an expression for the closed loop transfer function: Because the output is related to the actuating signal by G(s), we have
Consider the MSA marketing research example dis- cussed in Section 3.3 (page 74) of Chapter 3. Use the Sensitivity Report for this LP model.
If the two winners are drawn with replacement, what is the probability that a friend of the president wins each time?
An urn contains 8 black and 9 green balls. Five balls are randomly drawn from the urn in succession, with replacement.That is, after each draw, the selected ball is returned to the urn. What is the probability that all 5 balls drawn from the ur..
This project has put a lot of light on the necessity of sound doctrine and its importance. One would think that if people attended church more, they would be more in tune with God and sound doctrine
In a two-tailed test, with n = 20, the computed value of t is found to be t* = 1.85. Assuming the sample is randomly selected from a normal population, then the p-value is given by:
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