One way that researchers study the effects of trans fats on people's health is by setting up controlled experiments. for example, in an experimental feeding trial, participants agree to stick to specific diets that the researchers prescribe. in this case, the researchers might vary the proportions of saturated, unsaturated, and trans fats in the diet of each participant. throughout the study, the health status of the participants is monitored closely. suppose that you are a researcher designing an experimental feeding trial. how would you set up your study and what limitations would you face?

The food services division of cedar river amusement park inc. is studying the amount families who visit the amusement park spend per day on food and drink. a sample of 40 families who visited the park yesterday revealed they spent the following amounts: see worksheet 1 for data and answer the following questions: a. organize the data into a frequency distribution, using seven classes and 15 as the lower limit of the first class. what class interval did you select? b. what percent of families spent less than $45? c. what percent of families spent $55 or more? d. how many families spent from $65 to 74.99?