1. A new gelato boutique recently opened in Katherine's neighborhood. Being a frozen treat connoisseur, Katherine had to stop by. As she walked into the boutique, she was delighted to see that there were many flavors available. However, she was most interested in the fact that the prices were very reasonable compared to the prices she saw at many other gelato places.

Which of the following is an example of a statistic in Katherine's scenario?

a)All of the different types of gelato

b)The varieties of gelato currently available in the boutique

c)The average price of a serving of gelato nationwide

d)The average price of a serving of gelato at the boutique

2. Which statement is true regarding a 95% confidence interval?

a)There is a 2.5% chance that the alternate hypothesis will not be rejected.

b)There is a 5% chance that the population mean will not fall in the range given by the confidence interval.

c)There is a 95% chance that the null hypothesis will be rejected.

d)Only 2.5% of the data will indicate a significant value.

3. Derek recently took up gardening. To determine what type of fertilizer would keep his plants their healthiest, he took three identical plants and applied a different type of fertilizer to each. Next, Derekobserved how much each plant grew.

Derek is in effect performing an experiment that contains explanatory and response variables. Which statement best describes the explanatory and response variables involved in this experiment?

a)Plant type is the response variable and fertilizer is the explanatory variable, because different plants will require different amounts of fertilizer.

b)Fertilizer is the explanatory variable and plant growth is the response variable, because a change in fertilizer makes each plant grow differently.

c)Plant growth is the explanatory variable and fertilizer is the response variable, because fertilizer manipulates plant growth.

d)Fertilizer is the response variable and plant growth is the explanatory variable, because Derek measures plant growth as he changes fertilizers.

4. Which statement is correct regarding confidence intervals?

a) A confidence interval is used to indicate a sample mean

b) A confidence interval is used to determine the standard deviation from a mean.

c) A confidence interval is used to estimate a range of values for the population mean.

d) A confidence interval is used to indicate how confident a researcher is with a null hypothesis.

5. If the sum of squares for a sample containing 51 items equals 400, what is the standard deviation?

a)8.00

b)4.47

c)7.84

d)2.83

7. A sample of 9 residents' incomes in a particular town yields the following descriptive statistics:

$19,000	$20,000	$27,000
$38,000	$112,000	$45,000
$22,000	$49,000	$32,000

What is the interquartile range for this sample?

a)$26,000

b)$11,000

c)$100,000

d)$15,000

8. The data set below represents the heights (in inches) of students in a particular high school class:

70	67	68	64	59	71
62	66	67	73	67	62

What is the range of the data set? a)73 inches

b)14 inches

c)12 inches

d)8 inches