Leonard has been commuting to New York City on the Long Island Railroad for 10 years. Every morning he takes the 7:00 a. m. train that is scheduled to arrive in New York at 8:15 a. m. from Huntington, a suburb of New York. Although Leonard would like the train to arrive in New York on time, he knows from his experience as a commuter that it is more likely the train will be 5 minutes late. Leonard's expectation that his train will be 5 minutes late reflects his level of service for the Long Island Railroad.

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a researcher conducts a comparison of the comments made in a publicly available blog and the blogger's comments on a similar topic in a weekly magazine. undergraduate students in a field methods class are assigned a research question and asked to interview another classmate, to be followed by a class discussion on interview techniques. a cognitive psychologist enrolls undergraduate students for a computer-based study about the effect of mood on problem-solving behaviors. a researcher sets up a meeting with the superintendent of a large and diverse public school system to get data about the ethnic composition of the school system and the number of students receiving free lunches.