M152 ProjectI C 2015sp Lanio Modified Version MAT 152

For this project, we will use real data to practice the concepts we have been studying in class. In the questions below, you will be asked to use descriptive statistics to summarize data and inferential statistics to make generalizations about the populations. You may use your book and your notes to help you. You may discuss the work with a partner. But each person should turn in his/her own work.

Your results should be neatly written or typed, with the graphs done by hand. Show all work. Where applicable, indicate what calculator functions are used and what values are input to those functions. Type or write your work on the front of the page only, showing problems in a single linear column, not side-by-side. Make sure that each problem is numbered, in order. Write large enough so that your work is easy to read, i.e. do not try to squeeze it all onto a single page.

The data for the project is provided on the spreadsheet posted on Sakai. That data set represents a sample, not a population. Each question references some part of that data.

1. Construct a frequency table and frequency histogram for sugar content of breakfast cereals. Use a first class of 0 – 4.99. On the histogram, use a ruler to draw the axes and the bars. Mark units on the axes and label the values. Include a title. (10 pts.)
2. A. Find the five-number summary for the sodium content of breakfast cereals. List the values. Draw a boxplot to illustrate this. Be sure to show an evenly marked scale below it. Use a ruler to draw the figure. Comment on its shape, i.e. does it appear to be skewed left, skewed right, or symmetrical? (7 pts.)
B. Compute the IQR, UF, and LF for the sodium content of breakfast cereals. Does the data have any outliers? If so, list them. (7 pts,)
C. State the mode(s) of the sodium content of breakfast cereals. (2 pts.)
D. Compute the range of the sodium content of breakfast cereals. (2 pts.)
3. Find the sample mean and sample standard