Midterm Assessment in Probability and Statistics

What is the total of all probabilities in the normal distribution?

• 100

• 1

• -1

• -100

Which of the following is a discrete random variable?

• The average amount of electricity consumed

• The number of patients in a hospital

• The amount of paint used in repainting the building

• The average weight of the female athletes

If two coins are tossed, which is not a possible value of the random variable for the number of heads?

• 0

• 1

• 2

• 3

Which of the following variables is a continuous?

• Height of the senior high school students

• Junior high school students who are favor for limited face to face classes

• Number of fully vaccinated teachers

• Number of available classrooms for limited face to face classes

The following data were gathered from sir Jayson. Which is a discrete variable?

• He is 29 years old.

• He is 59 kilograms.

• He has two siblings.

• He is 5 feet and 4 inches tall.

If a coin is tossed, what are the possible values of the random variable for the number of tails?

• 0,1,2,3

• 1,2,3

• 0,1,2

• 0,1

Suppose 3 scientific calculators are tested. Let D represent the defective scientific calculator and N for the non-defective. How many possible outcomes will occur from the experiment?

• 3

• 4

• 8

• 9

A pair of coins are tossed. Let X be the number of tails that are observed. Find the probability that at least 1 tail is observed.

• 0.25

• 0.5

• 0.75

• 0.33

Four light bulbs are to be tested. What is the probability that two of them are defective?

• 3/8

• 4/8

• 5/8

• 6/8

• 0.33

• 0.44

• 0.56

• 0.67