Researchers studying long-term changes In regional mouse populations have found that by focusing on the populations of a rare but widespread and easily identifiable species of mouse (Species X), they can make fairly accurate estimations about the total regional mouse populations.

In a report on a recent study that Included the data tables that follow, the researchers provided some addenda:

1. " The Species X population of Region CV increased by 123,995 between 1990 and 2005.

2. In contrast, the Species X population of Region EW declined by about 52% during that same time.

The graph summarizes data on a sample of 100 automobiles requiring warranty service within one year of purchase. Each automobile required service in exactly one of seven categories. For each category, the frequency\ & the number of automobiles in the sample requiring service in that category; the cumulative frequency\s the total number of automobiles in (he sample requiring service in that category or in any of the categories to the left in the graph. In the graph, the frequency scale is on the left and the cumulative frequency scale is on the right.

From each drop-down menu, select the option that creates the most accurate statement based on the information provided.

The color red has been shown to induce greater aggression in people than the

color blue, Researchers conducted a study to determine whether such colorinduced aggression could influence the amount that consumers were willing to

pay for an identical product in online auction and online negotiation scenarios.

The researchers photographed a single item against each of four background

colors: blue, gray, white, and red. Using a computer, each participant in the study

viewed the item against exactly one of the four background colors. Half of the

participants were told the item was up for auction and were asked to submit their

highest bid for the item. The other half of the participants were told to negotiate

a price with the seller and were asked to offer the highest amount that they

would be willing to pay for the item.

The researchers expected that participants who viewed the red background

would typically behave more aggressively than those who viewed the blue

background. Among the auction group, the researchers hypothesized that more

aggressive participants would submit higher bids as they tried to beat other

potential bidders. Among the negotiation group, the researchers hypothesized

that more aggressive participants would make lower offers as they tried to

compete against the seller to get the best deal.

For each of the following statements about the researchers ' study, select Yes if

that statement accurately reflects the information provided. Otherwise, select No.

Was the median height of the 25 children in a certain class at least 2 percent greater than the average (arithmetic mean) height of the 25 children?

(1) The median height of the 25 children was 2 centimetefs greater than their average height.

(2) The sun of the heights of the 25 children was less than 2,550 centimeters.

If x is the median of a certain set of consecutive positive integers, which of the following must be true?

I. x Is positive.

II. x is even.

III. x is an integer.

In the standard (x,y) coordinate plane, points (a,b) and (c,d) lie on the graph of y = x 2 . If ac < 0, what is the y-intercept of the line containing (a,b) and (c,d) ?

(1) d = 9

(2) ac = -3

Jack ' s 1996 salary was x percent greater than his 1995 salary, and his 1997 salary was y percent greater than his 1996 salary. Kate ' s 1996 salary was y percent greater thar

her 1995 salary, and her 1997 salary was x percent greater than her 1996 salary. Was Jack ' s 1997 salary equal to Kate’s 1997 salary?

(1) Jack’s 1995 salary was equal to Kate’s 1995 salary.

(2) The dollar increase in Jack ' s salary from 1995 to 1997 was equal to the dollar increase in Kate ' s salary from 1995 to 1997.

Beth was charged r cents per minute for a phone call that she made and Mark was charged t cents per minute for a phone call that he made. If Beth’s phone call lasted 30 minutes, did Mark’s phone call last less than 30 minutes?

(1)

The total charge for Beth’s phone call was 10 percent less than the total charge for Mark’s phone call.

(2)

The charge per minute for Beth’s phone call was 40 percent less than the charge per minute for Mark’s phone call.