Numerical Measures of Central Tendency and Variability

Question 1 out of 4.

What is the range of 2, 4, 6, and 8?

________

Question 2 out of 4.

Would the variance of 10, 12, 17, 20, 25, 27, 42, and 45 be larger if the numbers represented a population or a sample?

• Population
• Sample

Question 3 out of 4.

What is the standard deviation of this sample?

________

  Y

  8

  5

 11

 11

 15

  9

  7

 18

Question 4 out of 4.

What is the interquartile range of these numbers?

________

Z

 12

 13

 14

 15

  9

 10

 16

 10

  8

 10

 11

 12

 13

 22

 23

 24

 25