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Question: You would like to test the claim that the variance of a normally distributed population is more than 2 squared units. You draw a random sample of 10 observations as 2, 4, 1, 3, 2, 5, 2, 6, 1, 4. A t α = 0.10, test the above claim using
(a) the p -value approach and
(b) the critical value approach.
Refer to Exercise 2.97 (p. 106). The data in the value of 50 Beanie Babies collector's items, published in Beanie World Magazine, are reproduced on the next page. Can age (in months as of Sept. 1998) of a Beanie Baby be used to accurately pred..
(a) What is P[X > 1/2]? (b) What is P[-1/2
Admission officers in Colleges A and B use SAT scores as their admission criteria. SAT scores are normally distributed with mean 500 and standard deviation 80.
Draw a normal probability plot for residuals using excel or Minitab. Do the residuals seem normally distributed? If yes, why?
Compute the value of t. What is your decision regarding the null hypothesis? Briefly summarize your results.
a television station estimates that 60 of college studentswatch the super bowl. for a sample of 240 students selected
In 1979 Bernard Hinault averaged 39.8 kph, while in 2005 Lance Armstrong averaged 41.65 kph. Which was the more remarkable performance and why?
a box contains 2 red marbles and 98 blue ones. draws are made at random with replacement.in draws from the box there
Find the correlation between number of contracts sold and average contract price. What does this correlation mean - What happened to the R2 as you added independent variables to the model? Will this always happen? Explain.
Technology often offers the potential of improving efficiency and effectiveness of transportation companies, but water carrier do not appear to have applied much new technology to improve their service. What impediments slow technological progress..
A certain birth defect occurs in 1 of every 10,000 births. In the next 5,000 births at a major hospital, what is the probability that at least one baby will have the defect? What assumptions are required to calculate this probability?
An SRS of 25 faculty members at a large southeastern university found that 10 felt that the university was supportive of female and minority faculty. What is the p-value of your test
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