Measure of center and variation Whitley howard

Find the range of these numbers:

27, 18, 19, 28, 28, 20

(a)  

1, 4, 6, 11, 11, 12, 13, 13, 19 Find the interquartile range. I've already arranged the values in order for you!

(a)  

Find the mean of these numbers:

27, 18, 19, 28, 28, 20

(a)  

A data set consists of the numbers 2, 2, 5, 6 and 15.  Which statement is true for this data?

• median > mean
• mean = mode
• mode < median
• median = mode

Find the standard deviation (3 sig figs)

• 18

• 1.71

• 1.68

• 1.69

If 10 is added to every value in a set of data, what will happen to the value of the median?

• it will increase by 10
• it will decrease by 10
• it will stay the same
• it will both increase and decrease

A data set can have more than one mode

• True
• False

At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the mode.
12,10,10,10,13,12,11,13,10

• 13
• 12
• 11
• 10

Brittany just started collecting marbles and has quite the collection so far. She wrote on a piece of paper, " 10 blue, 17 red, 12 rainbow, 10 gray/blue, 13 yellow/orange." What percentage of her collection is blue and gray/blue?

• 37%

• 1.9%

• 32%

• 68%

Brittany just started collecting marbles and has quite the collection so far. She wrote on a piece of paper, " 10 blue, 17 red, 12 rainbow, 10 gray/blue, 13 yellow/orange." What percentage of her collection is yellow/orange?

• 21%

• 49%

• 13%

• 24%