This problem is a checkpoint for displays of data. It will be referred to as Checkpoint .

For the information in parts (a) and (b), create a histogram. For the information in parts (c) and (d), create a box plot and then identify the quartiles and interquartile range.  

1. Hours spent doing after school sports each weekday by students: $0$, $4$, $0$, $1$, $1$, $1$, $\frac { 1 } { 2 }$, $1\frac{1}{2}$, $2$, $2$, $\frac { 1 } { 2 }$, $2$, $2$, $2$, $1\frac{1}{2}$, $1\frac{1}{2}$, $1$, $1$, $2$, $4$, $\frac { 1 } { 2 }$, $\frac { 1 } { 2 }$, $2$

2. Amount of time spent solving a math puzzle (minutes) by study teams: $3$, $15$, $18$, $14$, $10$, $14$, $19$, $8$, $14$, $14$, $15$, $19$, $9$

3. Average number of text messages sent per day by a group of friends: $47$, $52$, $50$, $47$, $51$, $46$, $49$, $46$, $48$

4. Number of points scored by the basketball team during a season: $76$, $90$, $75$, $72$, $93$, $82$, $70$, $85$, $80$

Check your answers by referring to the Checkpoint   materials located at the back of your book.

Ideally, at this point you are comfortable working with these types of problems and can solve them correctly. If you feel that you need more confidence when solving these types of problems, then review the Checkpoint materials and try the practice problems provided. From this point on, you will be expected to do problems like these correctly and with confidence.