The line plot shows the number of hours two groups of teens spent studying last week. how does the data compare for the two groups of teens? a. the 13- to 15-year olds spent an average of 14 hours studying last week. b. the range for the hours spent studying last week for the 13- to 15-year olds is the same as the range for the hours spent studying last week for the 16- to 18-year olds. c. the mode for the hours spent studying last week for the 13- to 15-year olds is less than the mode for the hours spent studying last week for the 16- to 18-year olds. d. the median value for the hours spent studying last week for the 13- to 15-year olds is greater than the median value for the hours spent studying last week for the 16- to 18-year olds.