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Decide whether a discrete or continuous random variable is
Chapter 2, Problem 182E(choose chapter or problem)
Problem 182E
Decide whether a discrete or continuous random variable is the best model for each of the following variables:
(a) The time until a projectile returns to earth.
(b) The number of times a transistor in a computer memory changes state in one operation.
(c) The volume of gasoline that is lost to evaporation during the filling of a gas tank.
(d) The outside diameter of a machined shaft.
Questions & Answers
QUESTION:
Problem 182E
Decide whether a discrete or continuous random variable is the best model for each of the following variables:
(a) The time until a projectile returns to earth.
(b) The number of times a transistor in a computer memory changes state in one operation.
(c) The volume of gasoline that is lost to evaporation during the filling of a gas tank.
(d) The outside diameter of a machined shaft.
ANSWER:
Solution:
Step 1 of 5:
In this problem we have to decide the given variables are continuous or discrete random variables.
Discrete random variable: a discrete random variable is a variable, which can only take a countable number of values.
continuous random variable: a continuous random variable is a variable whose value is obtained by measuring.