Descriptive Statistics and Graphing- Review Questions

1. Name three measures of central tendency and state a disadvantage of using each method.

2. Which measure(s) of central tendency are not useful for the data below? Why?
   3, 6, 4, 7, 9, 3, 5, 102, 8

3. Which measure(s) of central tendency is (are) not useful for the data below? Why? 
   0, 0, 0, 7.2, 7.3

4. Calculate the mean, median, and mode for the data below.
   3, 6, 4, 7, 9, 3, 5, 102, 8

5. Calculate the mean, median, and mode of the following data:
   3, 6, 4, 2, 2, 1

6. Calculate the following for the data below.
   64, 75, 72, 68, 66, 66

7. Suppose that you plot the weight of students in a class and obtain a bell shaped curve. You calculate a mean weight and a standard deviation. How can this information be used to provide you with a range of weights that includes 95% of the students?

8. Suppose that a researcher takes a sample of insects from a field and discovered that the mean length of the insects is 10.4 mm. The standard deviation is 1.5. What range of sizes will include 95% of the insects in the field?

9. Suppose that a researcher takes samples of mice from around New York State and discovers that the mean weight of the mice in the sample is 27 g and the standard deviation is 3 grams. Based on these data, what is the weight range of 95% of the mice in New York State?

10. Suppose that a researcher wished to display a graph of the number of each kind of insect found in a field. Explain why a line graph is not appropriate for this type of data.

11. Suppose that a researcher measured air temperature in a forest every hour for 24 hours. What kind of graph would be most appropriate for this data? 
    a) bar graph     b) line graph     c) scatter plot