Edwin's friends guessed how many jelly beans were in a jar at his birthday party. Here are their guesses. .

$75, 80, 95, 92, 100, 72, 71, 60, 65, 88, 60.$

1. Make a stem-and-leaf plot to display the data.

   Hint (a):

   See problem 4-27 in the text or look in the glossary for how to make a stem-and-leaf plot.

   Answer (a):

   $\left. \begin{array} { c | c c c } { 6 } & { 0 } & { 0 } & { 5 } \\ { 1 } & { 1 } & { 2 } & { 5 } \\ { 8 } & { 0 } & { 8 } & { } \\ { 9 } & { 2 } & { 5 } \\ { 10 } & { 0 } & { } \end{array} \right.$

2. Make a box-and-whisker plot to display the data.

   Hint (b):

   Refer to the Math Notes box in Lesson 4.2.4 for a reminder of box-and-whisker plots.

   Answer (b):

   

3. Which data display most clearly shows the median of the data? What is the median?

   Hint (c):

   Which plot takes into account the median when it is being constructed?

4. Based on the box-and-whisker plot, estimate what percent of students guessed more than $65$ jellybeans.

   Hint (d):

   Find $65$ on your box-and-whisker plot. Is there any measurement of center in that area? What does that part of the box-and-whisker plot represent? What percentile is that?

   More Help (d):

   Notice that the lower quartile exists at around $65$ guesses. The lower quartile is also representative of the 25th percentile.

   Answer (d):

   Approximately $75\%$ of students guessed more than $65$ jelly beans.

5. Use the stem-and-leaf plot to determine the actual percent of students who guessed more than $65$ jellybeans.

   Hint (e):

   Determine how many students guessed over $65$ jelly beans and how many students there were total.