REVIEWER IN STATISTICS AND PROBABILITY

Which of the following is a continuous random variable?

• A. the number of clothes

• B. the amount of paint consumed

• C. the number of subjects per semester 

Which of the following is a discrete random variable?

• A. the room’s temperature          

• B. the height of a basketball player        

• C. the number of buildings in a school

• A. 0,1,2                                     

    

• B. 1,2,3

           

•           C. 1,2,1   

Which of the following is a probability distribution?

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Which of the following is NOT a normal random variable?

• A. heights of Grade 7 students

          

•   B. grades of students join the remediation class

           

• C. ages of drivers

Which of the following statements about normal curve is NOT true?

• A. It is symmetric at the tails.

• B. The tails of the curve asymptotic to the baseline.

• C. the area under the normal curve is 1.

What does the mean of a normal curve represent?

• A. width of the curve                             

• B. location of the curve

• C. height of the curve

What is the area within ±2 standard deviation from the mean of a normal           curve?

               

•     A. 62.86%              

• B. 68.26%              

• C. 95.44%    

What is the area from the mean to z = 2.32?

         

•     A. 0.4938              

•   B. 0.4898              

•                C. 0.4772  

The height of Grade 12 students is normally distributed with the mean of 160 cm and the standard deviation is 4. What is the probability that the height is between 156cm and 164cm?

         

• A. 68.26%  

• B. 34.13% 

• C. 95.44%