The mucociliary escalator is found in the:

If you have a system with equally spaced non-degenerate energy levels, qualitatively how will the partition function, , change if you increase the temperature with a fixed spacing between the energy levels?

A child’s exposure to cigarette smoking, attendance at day care, and bottle propping are risk factors for which of the following conditions?

A 60 year old diabetic patient presents to the clinic with what he describes as “floaters”  and flashes of light.  Which differential belongs at the top of the list of differentials and needs an immediate referral?

Let’s assume the simplest linear regression model with a lagged dependent variable as follows:

Please match the description with the correct answer. Hint: Strict exogeneity is stronger than exogeneity assumption and is more likely to be violated.  An implication of weakly dependent time series is that the correlation between xt  and xt+h is almost must converge to zero if h grows to infinity. For the law of large number (LLM) and the central limit theorem (CLT) to hold, the individual observations must not be too strongly related to each other; in particular their relation must become weaker (and this fast enough) the farther they are apart.

Choose the sentence that best expresses the implied main idea of the paragraph below. When Attila the Hun and his barbarian hordes swept across northern Italy in about 430 CE., they wrought havoc and destruction on the remnants of the Roman Empire. But they unintentionally left another, more positive legacy as well. Refugees fled burning cities, desperate to find safe refuge. Some literally took to the swamps, finding sanctuary in a desolate group of islands in a marshy lagoon off the northern Adriatic. When the Huns were followed by other invading tribes, more Roman citizens streamed to the swamps to avoid the carnage and destruction on the mainland. Over the next few centuries, they transformed the inhospitable surroundings into an architectural wonder: Venice. With more than four hundred bridges and almost two hundred canals, the city on the lagoon became a center of trade and a seafaring power. By the 1200s, Venice was the most prosperous city in all of Europe. Today it remains one of the most beautiful (and most visited) cities in the world.

Choose the sentence that best expresses the implied main idea of the paragraph below. In ancient Rome, a left-handed boy who was training to be a soldier would have his hand bound to his side, and would be forced to use his weapon with his right hand. In the early Catholic Church, left-handedness was often interpreted as a sign of Satanic influence, and thus prohibited. In Christian-Greek Scriptures, many descriptions of the Last Judgment place the wicked or evil at the left hand of God, while the righteous sit at the right hand of God. During the early part of the twentieth century, Roman Catholic nuns in United States elementary schools sometimes punished children for using their left hand to write, typically by slapping their left hand with a ruler if they attempted to pick up a pen with it. As a result of such treatment during their formative years, baseball players Lou Gehrig and Babe Ruth continued to write right-handed, even though they hit and threw left-handed. Also, until very recently, in Chinese societies, left-handed people were strongly encouraged to switch to being right-handed. However, this may be in part because, while Latin characters are equally easy to write with either hand, it is more difficult to write legible Chinese characters with the left hand.

Choose the sentence that best expresses the implied main idea of the paragraph below. For many years the University of Chicago’s National Opinion Research Center has asked respondents whether they think the federal government is spending too much, too little, or about the right amount of money on “assistance for the poor.” Answering the question posed this way, about two-thirds of all respondents seem to believe that the government is spending too little. However, the same survey also asks whether the government spends too much, too little, or about the right amount for “welfare.” When the word “welfare” is substituted for “assistance for the poor,” about half of all respondents indicate that too much is being spent by the government.

Choose the sentence that best expresses the implied main idea of the paragraph below. T-shirts can function as trophies (as proof of participation in sports or travel) or as self- proclaimed labels of belonging to a cultural category (“Super Bowl LII Attendee,” “Retired”). T-shirts can also be used as a means of self-expression, which may provide wearers with the additional benefit of serving as a “topic” to initiate social dialogue with others. However, although we might expect that a Las Vegas T-shirt would be worn by a person who has been to Las Vegas (or has received it as a gift from someone else who has visited Las Vegas), this is not necessarily so. In such a world of “virtual identities,” consumers can now just buy a Las Vegas T-shirt at a local retailer and create the impression that they have been there.