Discrete and Continuous Random Variable

Which of the following best describe variable that can be counted?

• Categorical

• Continuous

• Discrete

• Ordinal

Which of the following statement describe a continuous random variable?

• The number of students present in a class

• The average distance traveled by a jeep in a week

• The number of correct guesses on a multiple choice test

• The number of women taller than 68 inches in a random sample of 5 Women.

Which of the following is discrete random variable?

• Hipolito weighs 65 kg

• Hipolito is 160 cm tall

• Hipolito has two brothers

• Hipolito ran 100 meters in 10.2 seconds

You decided to conduct a survey of families with two children. You are interested in counting the number of girls (out of 2 children) in each family. Is this a random variable?

• yes, it is a random variable

• No, it is not a random variable

• Maybe

• Cannot be determine

Which of the following is NOT a continuous variable?

• the amount of water in a jug

• the length of time attending a webinar

• The height of the tallest hill in Teresa, Rizal

• The number of OFW who travelled abroad each day

Which of the following best describe variable that can be measured?

• Categorical

• Continuous

• Discrete

• Ordinal

Which of the following statement DOES NOT describe a continuous random variable?

• The distance traveled by a truck in an hour

• The average height of a coconut tree each day

• The number of provinces belong to Region IV-A

• The intensity of an earthquake that happens last month

What is the difference between a discrete random variable and a continuous random variable?

• discrete random variable takes all values in an interval of numbers while a continuous random variable has a fixed set of possible values with gaps between.

• discrete random variable has a fixed set of possible values with gaps between while a continuous random variable takes all values in an interval of numbers.

• discrete random variable takes only negative numbers while a continuous random variable takes both positive and negative numbers.

• discrete random variable takes both positive and negative numbers while a continuous random takes only negative numbers.

The table represents the probability of guessing correct on a 5 question true-false quiz.  Find the probability for at least 4 questions correct.

• .03125

• .15625

• .3125

• .1875

• .88

• .12

• .78

• .22