ttcyftxycf (68)-4

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University of Florida *

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6600

Subject

Statistics

Date

Nov 24, 2024

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pdf

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Uploaded by ChiefOpossum3761

An analyst wants to construct a hypothesis test to determine whether the mean weekly return on a stock is positive. The null hypothesis for this test should be that the mean return is: A) Greater than zero B) Less than or equal to 0 C) Greater than or equal to 0 - ✔✔ B = Less than or equal to 0. Null hypothesis = condition if rejected would lend evidence to true alternative hypothesis. Alternative = Mean is Greater than 0. Null = Less than or = 0. X, Y, and Z are independently distributed random variables. The probability of X is 30%, the probability of Y is 40%, and the probability of Z is 20%. Which is closest to the probability that X or Y will occur? A) 70% B) 58% C) 12% - ✔✔ B = 58% The probability of X or Y is P(X) + P(Y) − P(XY). 0.3 + 0.4 − (0.3)(0.4) = 58% An analyst should use a t-test with n-1 degrees of freedom to test a null hypothesis that two variables have: A) equal means B) equal variances c) no linear relationship - ✔✔ A = Equal Means

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ttcyftxycf (68)-4

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