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1. As the elevation above sea level increases, the corresponding air pressure decreases.A scatterplot comparing elevation, in feet, to air pressure, as a percent of sea levelpressure, is shown below.
Elevations above 8,000 meters are said to be in the "death zone," a range of elevationsin which oxygen levels are not high enough to sustain human life. What is the approximateair pressure (as a percent of sea level pressure) at the death zone threshold? (Note:1 meter ≈ 3.28 feet)
2. As the elevation above sea level increases, the corresponding air pressure decreases.A scatterplot comparing elevation, in feet, to air pressure, as a percent of sea levelpressure, is shown below.
Air pressure is sometimes measured in inches of mercury. If sea level air pressuremeasures as 29.2 inches of mercury, what is the approximate difference, in inchesof mercury, between the pressure at sea level and the pressure at the death zone threshold?
3. A magnet school is a free public school that has a focused theme. According to thetable above, what was the increase in the total number of graduates in five of thesemagnet schools in District 1 from 2013 to 2014?
4. Many people shop online primarily because they get access to product ratings submittedby fellow shoppers. The frequency table above gives the most recent 20 customer ratingsfor a certain product sold online. What is the mean rating for this product?
5. Phase I clinical trials are run to determine the safety of all new drugs, especiallywith respect to the severity and duration of side effects. A physician is overseeinga Phase I trial based on 800 healthy participants. Half of the participants are giventhe drug, and half are given an inert pill. The mean duration of side effects forthose participants who were given the drug was 72 hours with a margin of error of6 hours. The physician is planning to replicate the trial in an attempt to decreasethis margin of error. Which of the following will most likely lead to a decrease inthe margin of error for the mean duration of side effects?
6. In a survey of 1,600 adults in the United States, 48% indicated that television istheir primary source of news. The margin of error for the survey is ±2.5%. Which valueis outside the interval that is likely to contain the exact percent of all adultsin the United States who get the news primarily from television?
7. Unemployment rates in the U.S. for the first four months of 2015 are given in thetable above. These rates are based on people, 16 years and older, that are consideredto be part of the workforce. In a certain district, there are 12,800 people eligibleto be part of the workforce, of which 53.5% are men. Based on the information in thetable, how many more men in this district were unemployed than women in April 2015in this district?
8. Luge is a winter sport in which a person slides down an ice track feet first on asmall sled. The luger lies supine (on his back) and uses his calf and shoulder musclesto steer the sled. Below is a summary of the times, in seconds, of three lugers' practiceruns on a track in Utah.
Which of the following conclusions can be drawn based on the data in the table?
9. Frederick is a business major and is conducting a study to determine the effect ofhaving agendas for project meetings at large companies. He surveyed a randomly selectedgroup of 500 project managers for large companies in Boston, MA, and found substantialevidence of an association between the duration of a project meeting and whether anagenda was followed. Which of the following can Frederick conclude from this information?
10. A study of gasoline prices across a particular state showed that the state's meangas price was $2.87 per gallon, and the median gas price was $3.25 per gallon. Whichof the following most likely accounts for the difference between the mean and mediangas prices in this state?
11. Brian and several of his work colleagues are on a kickball team together. The dotplot above shows the number of points his team scored during each of 14 games playedso far this season. The league's record for highest average points scored per gameduring a season is 7.5. To break this record, a team's season average must be at leasthalf a point higher. If Brian and his teammates are to set a new season record, howmany points must they average during their final two games?
12. The average gas mileage for n vehicles on one car lot is 21 miles per gallon. The average gas mileage for p vehicles on another car lot is 25 miles per gallon. When the vehicles on both lotsare combined, the average gas mileage is 22.5 miles per gallon. What is the valueof?
13. Five numbers are given by the expressions x, 2x - 3, 2x + 1, 3x - 4, and 3x + 1. If the average (arithmetic mean) of these numbers is 10, what is the mode ofthe numbers?
14. According to the information in the table, which of the following correctly ordersthe populations of the metro areas from greatest to least?
15. The table above summarizes storm activity in the Atlantic Ocean between 1990 and 2009.What portion of the storms between 1990 and 1999 were classified as major hurricanes?
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