Final answer:
To collect data on his classmates' sleeping habits, Marcus should ask them to write down how many hours of sleep they get per night and hand it to him. He can then process and visualize the data in a Histogram.
Step-by-step explanation:
To collect data on the sleeping habits of his classmates, the best technique for Marcus would be option (a), which is asking each classmate to write down on a piece of paper how many hours of sleep they get per night and hand it to him. This method allows Marcus to directly collect the data from his classmates and ensures that he receives accurate information about their sleeping habits.
Once Marcus has collected the data, he can process it with a computer and visualize it in a Histogram. A Histogram is a graphical representation of data that uses a series of rectangles to represent the frequencies of different data ranges. In Marcus' case, he can use the hours of sleep as the data range and the frequency as the height of each rectangle to show how many classmates sleep for a particular number of hours.
For example, if Marcus' classmates reported sleeping for 6, 6, 7, 7, 8 hours, the Histogram would have a rectangle with a height of 2 for the data range of 6-7 hours and a rectangle with a height of 1 for the data range of 8-9 hours.