Here again are the two graphs from the study of the weight of school back pack for nineteen 7th graders. Complete the sentences in the description of the distribution of back pack weight.

In this study of a group of 7th graders, school backpack weights range from [ Select ] ["0", "3"] to [ Select ] ["39", "40"] .

Typical 7th graders are carrying [ Select ] ["20 pounds", "from 19 pounds up to (and including) 22 pounds", "9 pounds up to (and including) 27 pounds", "0 pounds up to (and including) 40 pounds"] ; about half (9 out of 19) are carrying this amount of weight.

In this study, students carrying [ Select ] ["3 pounds", "27 pounds", "39 pounds"] are unusual.