15 A professor had students keep track of their social interactions for a week. The number of social interactions over the week is shown in the following grouped frequency distribution. Identify the lower limit of the tenth class. Number of Social Interactions Frequency 25​-29 9 30​-34 16 35​-39 18 40​-44 19 45​-49 15 50​-54 11 55​-59 4 60​-64 8 65​-69 0 70​-74 4 Lower limit  of the tenth class : ________.

A professor had students keep track of their social interactions for a week. The number of social interactions over the week is shown in the following grouped frequency distribution. Identify the lower limit of the tenth class​ Number of Social Interactions Frequency 45​-49 9 50​-54 13 55​-59 17 60​-64 20 65​-69 18 70​-74 10 75​-79 3 80​-84 8 85​-89 0 90​-94 2

Consider the following frequency table representing the distribution of hours students spend on the internet in a week. Hours Students Spend on the Internet in a Week Class Frequency 3–9 6 10–16 13 17–23 11 24–30 8 31–37 7   Determine the lower class boundary for the second class.

The following are the ages of 30 employees at a local computer company: 29 35 21 28 25 36 44 27 24 24 19 21 33 32 49 25 26 20 32 29 23 37 26 31 29 28 25 25 30 24 0. Find the minimum and maximum of the data. 1. Create a stemplot of the data. 2. Organize the stems of the stemplot. 3. Create a new stemplot by splitting the stems. 4. Make a frequency table of the data, with a first interval of “19-22": 5. Create a histogram of the data from the frequency table. 6. Check your work by replicating the histogram on your calculator.

Identify the lower class limits, upper class limits, class width, class midpoints, and class boundaries for the given frequency distribution. Also identify the number of individuals included in the summary. Blood Platelet Count of Females (1000 cells/uL) Frequency 100-199 200-299 24 91 26 300-399 400-499 1 500-599 4 Identify the lower class limits. 00000 (Type integers or decimals. Do not round. Use ascending order.) Identify the upper class limits. (Type integers or decimals. Do not round. Use ascending order.) Identify the class width. Enter your answer in each of the answer boxes.

Consider the following frequency table representing the distribution of hours students spend on homework in a week. Hours Students Spend on Homework in a Week Class Frequency 7–13 13 14–20 14 21-27 12 28–34 7 35–41 4 Determine the class width of each class.

The following frequency distribution gives the credit card debt of bank customers. Debt Frequency $0- $999 100 $1000 $1999 300 $2000 - $2999 1200 $3000 - $3999 1100 $4000 $4999 600 $5000 - $5999 200 Give the class boundaries. $999 O $1999.50, $2999.50, $3999.50, $4999.50 $1999.05, $2999.05, $3999.05, $4999.05 O $1000 « Previous

22 The number of social interactions of ten minutes or longer over a​ one-week period for a group of college students is given in the following frequency table.​ (These interactions excluded family and work​ situations.) Find the​ mean, median,​ mode, and midrange for these data.   Social interactions in a​ week: x 5 6 13 18 22 28 32 36 43 49     Number of college​ students: f 15 18 18 18 13 14 5 4 4 4       The mean is approximately ________. ​(Round to the nearest tenth as​ needed.)