Statistics and Probability Q3 Exam Review

The shape of the Normal Curve is

• Circular

• Bell Shaped

• Spiked

• Flat

   

What is the value in the middle if the data are arrayed from the lowest to the highest value?

• Mean

• Median

• Mode

• Variance

Which measures of central tendency is obtained by calculating the sum of values and dividing this figure by dividing the number of values there are in the data set?

• Mean

• Median

• Mode

• Variance

What refers to the process of listing all the values of a random variables X together with its associated probability?

• random distribution

• Normal distribution

• Variance

• Probability distribution

In probability distribution, the sum of probabilities must be equal  to

• 1/2

• 2

• -1

• 1

What is the mode number of breaks taken by a worker  d  during a 10 day period given the following data?    3 ,5 ,9 ,3 ,2 ,2 ,3 ,3 ,1 ,6.

• 2

• 3

• 1

• 5

The following are the ages of the first ten students who  enrolled in a certain college. Find the mean.         

23 ,21 ,18 ,17 ,19 ,21 ,20 ,18 ,19 ,24. 

• 2

• 19

• 20

• 21

What refers to the number that tells us how clustered or spread out the values about the mean of a data set?

• Standard Deviation

• Mean

• Median

• Mode

Which of the following statistics measures the most frequently occurring value in a set of data?

• Mean

• Median

• Mode

• Variance

What is the arithmetic mean of values 2 ,7 ,9 ,8, 3, 18,2 ?

• 7

• 8

• 9

• 11