Suppose that a sample of 20 mutual funds had been taken. Without doing the calculations, indicate how this would change the 95 interval for the population variance when a random sample of 10 stock market mutual funds was taken.
What will be an ideal response?
Q. 2If the Durbin-Watson statistic d has values greater than 4 - dL, this indicates:
A) a positive first-order autocorrelation.
B) a negative first-order autocorrelation.
C) no first-order autocorrelation at all.
D) an inconclusive test.
Q. 3Which of the following is true of the p-value?
A) It is the probability of rejecting the null hypothesis when the null hypothesis is true.
B) It is the smallest significance level at which a null hypothesis can be rejected.
C) It is the probability of rejecting the null hypothesis when the alternative hypothesis is true.
D) It is the extreme value of the test statistic obtained when the alternative hypothesis is true.
Q. 4The power of the test represents the ________.
A) probability of correctly failing to reject the null hypothesis when it is indeed true
B) probability of incorrectly rejecting the null hypothesis when it is actually true
C) probability of incorrectly failing to reject the null hypothesis when it is actually false
D) probability of correctly rejecting the null hypothesis when it is indeed false
Q. 5Suppose that for a sample of 65 observations from a population of 500, the sample mean is 25.6 and the sample standard deviation is 2.8. Create a 90 confidence interval for the population mean.
A) 25.6 0.318
B) 25.6 0.415
C) 25.6 0.467
D) 25.6 0.533
Q. 6The value of the variation explained by the regression line can never be smaller than 0.0.
Indicate whether the statement is true or false
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