13. A description of the distribution of the values of a random variable and the

Question

13. A description of the distribution of the values of a random variable and their associated probabilities is called a a. probability distribution b. empirical discrete distribution c. bivariate distribution d. table of binomial probability 14. The weight of an object is an example of a. a continuous random variable. b. a discrete random variable. c. either a continuous or a discrete random variable, depending on the nature of the object d. either a continuous or a discrete random variable, depending on the unit of measurement. 15. Twenty percent of the students in a class of 100 are planning to go to graduate school. The standard deviation of this binomial distribution is a. 20 b. 16 c. 4 d. 2

Explanation / Answer

13. a) Probability distribution

14. b) discrete because weights will be specific numbers for each probability

15. p is 0.2 and N is 100

standard deviation is sqrt(p*(1-p)*N)= sqrt(0.2*0.8*100)=4 answer C

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