Exam+2+stats+extra+creditt

# Exam+2+stats+extra+creditt - PSY B 305 Exam 2 Page 1 NAME...

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PSY B 305 Exam 2 Page 1 NAME:__________________________________________________________ True/False Indicate whether the statement is true or false. ____ 1. A random sample results when each possible sample of a given size has an equal chance of being selected. ____ 2. If an event is certain to occur, its probability of occurrence equals 1.00. ____ 3. If P >Q, the binomial distribution will be symmetrical. ____ 4. If P = 0.30 and Q = 0.67, the binomial distribution does not apply. ____ 5. If H 0 is false, and we retain it, we have made a Type II error. ____ 6. If alpha is made more stringent, beta increases. ____ 7. The sampling distribution of the mean is always normally distributed. ____ 8. The critical region for rejection of H 0 is the area under the curve that contains all the values of the statistic that allow the rejection of H 0 . Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 9. If A and B are mutually exclusive and exhaustive, then p ( A and B ) = ____. a. 1 b. 0 c. p ( A ) + p ( B ) d. p ( A ) + p ( B ) - p ( A and B ) ____ 10. A famous hypnotist performs in Meany Hall before a crowd of 350 students and 180 non-students. The hypnotist knows from previous experience that one-half of the students and two-thirds of the non-students are hypnotizable. What is the probability that a randomly chosen person from the audience will be hypnotizable or will be a non-student? ____

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