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(02.05 MC)  You want to know the opinions of home-schooled students across America on whether they prefer to learn at home versus at a public school with other students. You obtain a list of all home-schooled students and mail a survey to a random sample of 7,500 students. Of those, 4,195 responded and 39% say they prefer to learn at home. Which of the following statements is true? (5 points)

A viral disease of severe respiratory distress was first identified in the United States and spread to multiple continents affecting millions of people. Which term defines this level of occurrence?

(01.02, 02.01 MC) A surveyor randomly interviewed 34,572 people who live in Scotland to gather information on whether national healthcare is accomplishing its goals.Part A: What are the population and sample in this survey? (4 points)Part B: The survey found that 70% of smokers and 87% of non-smokers visited a family doctor at least once in the past year. Do you think these approximations of the sample are close to approximations of the entire population? Explain. (6 points) (10 points)

(01.06 MC)  The box plots below show the lifespan, in months, of laptop batteries manufactured by four companies: Based on the data, which company manufactures batteries having the greatest variation in lifespan? (5 points)

Which of the following parameters may be adjusted to influence the efficiency of a GC separation? (note there may be more than one correct response)

What term refers to the ability to distinguish two peaks from one another in a chromatogram?

(03.02 MC) James believes the honor roll students at his school have an unfair advantage in being assigned to the math class they request. He asked 500 students at his school the following questions: “Are you on the honor roll?” and “Did you get the math class you requested?” The results are shown in the table below: Honor roll Not on honor roll Total Received math class requested 315 64 379 Did not get math class requested 41 80 121 Total 356 144 500 Help James determine if all students at his school have an equal opportunity to get the math class they requested. Show your work and explain your process for determining the fairness of the class assignment process. (10 points)

Rank the following ways of optimizing selectivity in GC in the order in which you would use them experimentally – take into account both effectiveness and speed:

Which compound will have the highest Retention (Capacity) Factor (k)?

(01.03 MC) The Kelly school district gives awards to its schools based on overall student attendance. The data for attendance are shown in the table below, where Min represents the fewest days attended and Max represents the most days attended for a single student: School Min Max Range Mean Median IQR σ High School M 128 180 52 141 160 55.5 41.5 High School N 131 180 49 159 154 48.5 36.5 High School P 140 180 40 153 165 32.5 31.5 Part A: If the school district wants to award the school that has the most consistent attendance among its students, which high school should it choose and why? Justify your answer mathematically. (5 points) Part B: If the school district wants to award the school with the highest average attendance, which school should it choose and why? Justify your answer mathematically. (5 points) (10 points)