Suppose that the dean of students at your campus wants to know the average number of hours per week that students study. to determine this, the dean conducts a survey by randomly drawing the contact information of 100 students from the list of currently enrolled students. what is the sample in this study?

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The authors of the paper "fudging the numbers: distributing chocolate influences student evaluations of an undergraduate course"† carried out a study to see if events unrelated to an undergraduate course could affect student evaluations. students enrolled in statistics courses taught by the same instructor participated in the study. all students attended the same lectures and one of six discussion sections that met once a week. at the end of the course, the researchers chose three of the discussion sections to be the "chocolate group." students in these three sections were offered chocolate prior to having them fill out course evaluations. students in the other three sections were not offered chocolate. the researchers concluded that "overall, students offered chocolate gave more positive evaluations than students not offered chocolate." indicate whether the study is an observational study or an experiment. give a brief explanation for your choice.

Which sentences do not meet the requirements of an effective thesis statement? select all that apply. due to educational cutbacks, we really need your to buy new softball and baseball equipment. if you donate to our cause, you will receive free tickets to all our school's sporting events. your generous donation will allow our school to offer softball and baseball this year. in addition to free tickets, we will allow you to hang an advertising banner on the outfield fence. if you donate to support our cause, you will not only receive free tickets and a free advertising opportunity, you will earn the devotion and loyalty of many within our school.