m Grouped Data 0 of 1 Point A sample of college students was asked how much they spent monthly on cell phone plans. Approximate the standard deviation for the cost. Monthly cell phone plan cost ($) Number of students 10.00-19.99 5 20.00-29.99 15 30.00-39.99 23 40.00-49.99 14 50.00-59.99 9 The sample standard deviation for the cost is $| |(Round to the nearest cent as needed.) More Help me solve this View an example Get more help Clear all