Q3: Lesson 3 | Exploring Random Variable

Question 1

may be viewed as a way of map outcomes of statistified experiment determined by chance into a number

Answer 1

random variable

Question 2

it is a set whose elements are the numbers assigned to the outcomes of an experiment

Answer 2

random variable

Question 3

a random variable that can take on a finite number of distinct values

Answer 3

discrete random variable

Question 4

a random variable that take an infinitely uncountable number of possible outcome, typically measurable quantities

Answer 4

continuous random variable

Question 5

consists of values a random variable can assume and the corresponding probabilities

Answer 5

discrete probability distribution

Question 6

considered as a measure of the central location of a random variabe

Answer 6

mean

Question 7

it is the weighted average of the values that random variable x can take, with weights provided by the probability distribution

Answer 7

mean

Question 8

of a discrete random variable x can be computed by first multiplying each possible x value by the probability of observing that value and then adding the resulting quantities

Answer 8

expected value or mean value

Question 9

measure of spread

Answer 9

variance

Question 10

measure of variability/dispersion

Answer 10

standard deviation