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Question: An important measure of the risk associated with a stock is the standard deviation, or variance, of the stock's price movements. A financial analyst wants to test the one-tailed hypothesis that stock A has a greater risk (larger variance of price) than stock B. A random sample of 25 daily prices of stock A gives s2A = 6.52, and a random sample of 22 daily prices of stock B gives a sample variance of s2B = 3.47. Carry out the test at α = 0.01.
Verify that the acf display a damped sine wave behavior and find the frequence and period of the acf
An alcohol awareness task force at Big-Ten university sampled 20 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying
Suppose we fit the model y = X1β1+ ε when the true model is actually given by y = X1β2 + X2β2 + ε. For both models, assume E(ε) = 0 and Var(ε) = σ2I. where I is the identity matrix. Find the expected value and variance of the ordinary least-squares e..
Assume the standard deviation of the distribution is 2.5pounds, what is the probability that the mean of a sample of 55 families is between 17 and 18 pounds.
Using the appropriate statistical table, what is the most accurate statement we can make about the p-value for the test? Construct and interpret the 95% confidence interval for the difference between the population means.
Which of given is the correct decision statement for test?
A coin was flipped twenty times and landed heads fifteen times. Based upon this information, answer the following the question:
what are the probability of you having the disease?
Discuss the rise of Adolph Hitler to power in Germany. What goals did Hitler espouse and how did he plan to achieve them? And why did so many Germans support the Nazis?
The teacher of a class you're taking tells the class that he thinks students who often skip classes have twice the risk of failing the class compared to students who regularly attend class. To better understand his claim, what question(s) would be..
a repeated-measures study comparing two treatments with n 4 participants produces md 2 and ss 75 for the difference
What assumptions must be met to perform the F test of two variances
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