11) The following contingency table provides a joint frequency distribution for
ID: 3340167 • Letter: 1
Question
11) The following contingency table provides a joint frequency distribution for the popular votes cast in the presidential election by region and political party. Data are in thousands, rounded to the nearest thousand Political P Demo. Repub Other Total Northeast 904611,336 10120,483 Region Midwest10,514,76116925,441 South 10,99817,699 136 28,833 702210,659214 17,895 Total 37,57754,455 62092,652 West R4 A person who voted in the presidential election is selected at random. Compute the probal that the person selected was in the West and voted Republican A) 0.781 B) 0.115 C) 0.588 D) 0.196 5.1 Probability Distributins. Identify the given random variable as being discrete or continuous 12) The number of freshmen in the required course, English 101 A) Discrete B) Continuous 13) The height of a randomly selected student A) Discrete B) Continuous 14) The braking time of a car A) Discrete B) Continuous 15) The number of field goals kicked in a football game A) Discrete B) ContinuousExplanation / Answer
11)
Probability that the perrson selected was in the west and voted replubic
Number of persons who were in west and voted replubic = 10659
Total number of persons = 92652
Probability that the perrson selected was in the west and voted replubic = Number of persons who was in west and voted replubic / Total number of persons = 10659/92652=0.115
Ans : B) 0.115
5.1)
A discrete random variable X has a countable number of possible values.
A continuous random variable X takes any value in a specified interval of numbers
12) Number of freshmen in the required course.
A) Discrete
as this can take only 0,1,2,3,4,....These are countble number of values . hence Discrete random variable
13) The Height of a randomly selected student .
B) Continuous . As this can take any values in a a specified range of numbers (for example height could any thing in the range 1 to 9 feet).
14) Braking time of a car :
B) Continuous . As this can take any values in a a specified range of numbers (Any time bewtween 1 to 60 seconds)
15) Number of goals
A) Discrete
as this can take only 0,1,2,3,4,....These are countble number of values . hence Discrete random variable
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