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For the questions below, consider the following data describing the number of dumplings each customer ordered from a food truck during a 1 hour period:

10 20 6 15 15 3 30 18 12 5 15 6 12 25 10 8

Say we wish to divide this data into 6 classes for the purposes of a histogram.

1.  Find the class width.

a.  3

b.  4

c.  5

d.  6

e.  7

2.  What is the upper class limit of the third class (where we count from the lowest to the highest)?

a.  8

b.  12

c.  13

d.  17

e.  18

Say you wish to select a sample of 100 people from a population of 600 people. You number the people in the population 1 through 600. Then you role a fair die. If the die comes up 1, you select the people numbered 1 through 100. If the die comes up 2, you select the people numbered 101 through 200, and so on if the die comes up 3, 4, 5 or 6.

3.  Does every person in the population have an equal chance of being in the sample?

a.  Yes.

b.  No.

4.  Does this methodology result in a simple random sample?

a.  Yes.

b.  No.

5.  If you want to take a poll of students at liberal arts colleges, and you choose 6 colleges at random and send someone to conduct a poll at these locations, what kind of sampling are you doing?

a.  Simple Random

b.  Stratified

c.  Systematic

d.  Cluster

e.  Convenience