Statistics and Probability REVIEWER

Which of the following is a variable whose values are determined by chance?

• Discrete random variable

• Random variable

• Sample space

• Variable X

Which of the following is discrete random variable?

• Jean's hair color is blue

• Jean weighs 68 kilograms

• Jean ran 350 meters in 3 minutes

• Jean has 6 bags color (blue, green, yellow, red and violet)

Which of the following is NOT a continuous random variable?

• The height of the airplane's flight

• The amount of liquid on a container

• The length of time for the check up in the hospital

• The number of COVID 19 cases in Vintar in the month of November

Which of the following is NOT a discrete variable?

• The number of non-defective laptops

• The number of vehicles owned by Teves's family

• The weight of box delivered by the grab driver last December

• The number of coins that match when three coins are tossed at once.

What is the graph of a normal distribution that is symmetrical about the ________?

• mean

• mean and standard deviation

• standard deviation

• none of the above

What sampling technique is used where every number of the population has an equal chance of being selected?

• Cluster

• Simple

• Stratified

• Systematic

A school official reports that 63 percent of all students arrived in the school on time last school year. What describes the underlined value?

• population

• statistic

• stratified

• systematic

Which of the following is an EXAMPLE of parameter?

• The Philippine Senate is composed of 24 senators.

• Luzon is one of the main islands of the Philippines.

• Twelve percent of the voter chose Mr. Dimasalang as Mayor.

• Twenty-five people were randomly selected by the researcher.

How many possible sizes of 2 can be drawn from a population of size 10?

• 35

• 45

• 80

• 100

The Philippine Senate is composed of 24 senators. What is being described in the underlined phrase?

• parameter

• statistic

• random sample

• systematic sample