Mrs. Ferguson, your school librarian, asks you to conduct a survey of how many books students read during the year. You get the following results: $12$, $24$, $10$, $32$, $12$, $4$, $35$, $10$, $8$, $12$, $15$, $20$, $18$, $25$, $21$, and $9$.  

1. Use the data to create a histogram. Use a bin width of $10$ books. (Remember, if a value falls on the line, place it in the upper bin.)

   Hint (a):

   Try putting the data in order to make creating the histogram easier.

   More Help (a):

   What are the two axes of the histogram? How can you arrange the data to fit these two axes?

2. Is the mean or median a better measure of the center? Find the value of whichever is more appropriate.

   Hint (b):

   Remember that the mean is the average of the data, and the median is the value in the middle of all the data.

   Answer (b):

   Because the data is almost symmetric with no outliers, either the mean or median is appropriate.
   $\text{Mean}\approx16.69$ books
   $\text{Median}=13.5$ books

3. Make a box plot of the data.

   Hint (c):

   Think of the parts of a box plot. How can you use the data to create one?

4. Describe the center, shape, spread, and outliers of the distribution.

   Answer (d):

   The typical student reads about $13.5$ books, and the distribution is almost symmetrical and single-peaked.
   The IQR is $12.5$ so there is a lot of variability in the number of books read, but no apparent outliers.