EPPS 2301: Methods of Quantitative Analysis in the Social and Policy Sciences ui
ID: 3044119 • Letter: E
Question
EPPS 2301: Methods of Quantitative Analysis in the Social and Policy Sciences uiz 2 **To receive credit for answers that require calculations, you must show your work. ULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. The expected value of a discrete probability distribution may be negative. 1) 1) True or False: A) True B) False bilit ite er 2) The sum of the probabilities of a discrete probability distribution must be 2) A) less than or equal to zero. C) between zero and one. B) greater than one. D) equal to one. 3) A normal probability plot is a graph that plots 3) versus A) observed scores, normal data C) normal score, observed data B) normal data, observed scores D) observed data, normal scores ORT ANSWER 4) Consider the discrete probability distribution to the right when answering the following 4) question. Find the probability that x equals 4. Px) 004 0.07 0.31 5) From the probability distribution, find the mean and standard deviation for the random 5) variable x, which represents the number of bicycles per household in a town of 1000 households x P(x) 0.125 1 0 429sExplanation / Answer
1)
true (as probability can not be but expected value can as domain of variable can have negative values)
2)
option D (equal to 1)
3)
option D
4)
as sumof probability should be equal to 1
therefore P(X=4) =1-(0.04+0.07+0.31)=0.58
( Q no 5 is not complete)
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