"Stem-and-Leaf Plots"
1. Your class just took your last math test of the year. These are the scores: 97, 99, 81, 78, 73, 95, 33, 97, 64, 100, 85, 83, 85, 88, 79, 81, 93, 86, 83, and 71.
a. Draw a stem and leaf plot
b. What are the mean, median, and mode of the data?
c. Given this information would you say that the students did
well on the exam? Explain.
2. You decide to get odd jobs for the summer and you keep a log of your daily earnings. In one month you earned the following amounts: $12, $9, $15, $17, $20, $12, $9, $6, $13, $15, $11, $17, $18, $14, $15, $20, $25, $13, $12, $15.
a. Draw a stem and leaf plot.
b. What are the mean, median, and mode of the data?
c. Describe the shape of the data set. Is it symmetric or are there extreme values in the low or high numbers?
d. What was your average daily income?
3. During the summer you also play in a recreational soccer league. Your team's scores were: 9, 5, 2, 10, 7, 6, 7, 2, 5, 7, 9, 10, 9, and 6.
a. What are the mean, median, and mode of the data?
b. Describe the shape of the data set. Is it symmetric or are there extreme values in the low or high numbers?
c. Draw the appropriate stem-and-leaf plot and write your
answer for the most common score.