What problems do you see with asking the following question of students? "Are you the first member of your family to seek higher education?"

A professor teaching a large lecture class of 350 students samples her class by rolling a die. Then, starting with the row number on the die (1 to 6), she passes out a survey to every fourth row of the large lecture hall. She says that this is a Simple Random Sample because everyone had an equal opportunity to sit in any seat and because she randomized the choice of rows. What do you think? Be specific.

People who claim to "have ESP" participate in a screening test in which they have to guess which of several images someone is thinking of. You and a friend both took the test. You scored 2 standard deviations above the mean, and your friend scored I standard deviation below the mean. The researchers offer everyone the opportunity to take a retest. Should you choose to take this retest? Explain.

Consider the Angus weights model N(1152, 84) one last time. What weight represents the 40th percentile?

Write the correct label A, B, C, or D under each term to indicate the definition of that term. Precipitation ____. A. The change of state from a liquid to a gas B. The change of state-from a gas to a liquid C. The movement of water between the atmosphere, land, oceans, and living things. D. Any form of water that falls to Earth's surface from the clouds.

A 2013 Pew Research survey of 802 teens found that, among teens aged 12-17, girls were significantly more likely to access the internet mostly through their smartphone. 29% of the girls surveyed said they access the internet mostly on their phone, compared to 20% of the boys. What does it mean to say that the difference in proportions is "significant"?

Major League Baseball tests players to see whether they are using performance-enhancing drugs. Officials select a team at random, and a drug-testing crew shows up unannounced to test all 40 players on the team. Each testing day can be considered a study of drug use in Major League Baseball. Is that choice appropriate?

A study of baseball players shows that left-handed players have a higher death rate than right-handers. One observer explained this as "due to confounding: baseball players are more likely to be left-handed than the general population, and the players have higher death rates too." Is that a good explanation for the data? Answer yes or no, and explain briefly.

Suppose you were to collect data for each pair of variables. You want to make a scatterplot. Which variable would you use as the explanatory variable and which as the response variable? Why? What would you expect to see in the scatterplot? Discuss the likely direction, form, and strength. When climbing mountains: altitude, temperature

Some people play state-run lotteries by always playing the same favorite "lucky" numbers. Assuming that the lottery is truly random, is this strategy better, worse, or the same as choosing different numbers for each play? Explain.

The president of the university plans a speech to an alumni group. He plans to talk about the proportion of student who responded in the survey that they are the first in their family to attend college, but the first draft of his speech treats that proportion as the actual proportion of current A&M students who are the first in their families to attend college. Explain to the president the difference between the proportion of respondents who are first attenders and the proportion of the entire student body that are first attenders. Use appropriate statistics terminology.

Major League Baseball tests players to see whether they are using performance-enhancing drugs. Officials select a team at random, and a drug-testing crew shows up unannounced to test all 40 players on the team. Each testing day can be considered a study of drug use in Major League Baseball. What kind of sample is this?

Administrators at a university were interested in estimating the percentage of students who are the first in their family to go to college. The student body has about 50,000 members. How might the administrators answer their question by applying the three Big Ideas?

A manufacturing company employs 14 project managers, 48 supervisors, and 377 laborers. In an effort to keep informed about any possible sources of employee discontent, management wants to conduct job satisfaction interviews with a sample of employees every month. a) Do you see any potential danger in the company's plan? Explain. b) Propose a sampling strategy that uses a simple random sample. c) Why do you think a simple random sample might not provide the representative opinion the company seeks? d) Propose a better sampling strategy. e) Listed below are the last names of the project managers. Use random numbers to select two people to be interviewed. Explain your method carefully. Barrett, Bowman, Chen DeLara, DeRoos, Grigorov, Maceli, Mulvaney, Pagliarulo, Rosica, Smithson, Tadros, Williams, Yamamoto