MAT 133: Ch. 2 Review WS p.4 4. A college professor had students keep a diary of their social interactions for a week. Excluding family and work situations, the number of social interactions of ten minutes or longer over the week is shown in the following grouped frequency distribution. Data Set is available as a Google Spreadsheet at THIS LINK a) Fill in the table (Give 3 decimal places for both relative frequency columns) Cumulative Number of Social Relative Cumulative Relative Frequency Interactions Class Midpoints Frequency Frequency Frequency 0-4 12 5-9 17 10-14 16 15-19 16 20-24 10 25-29 11 30-34 4 35-39 3 40-44 3 45-49 3 b) How many students kept journals for the professor? c) What is the lower class limit of the 4th class? d) What is the class width? e) What appears to be the shape of this distribution? (Circle One) Skewed Left Symmetric Skewed Right f) What percentage of students had between 20 and 29 interactions? g) How many students had 29 or fewer social interactions? h) What percentage of students had 14 or fewer social interactions? i) What is the modal class