IM – 11 | 13
ACTIVITY 11.4 USING STATISTICS
Purpose: Students should be able to define the statistical terms used to summarize or
describe numerical data, to derive statistical data from raw numbers or information, and
to decide which statistics are best suited for presenting certain types of information.
Procedure: Distribute the following “Which Statistic Do I Use?” form to each student to
answer individually. The students may refer to the text as often as necessary to answer
the questions.
WHICH STATISTICS DO I USE?
1. If you had all the grades for all the seniors at two major universities, how would you
compare the abilities of the students at the two schools?
2. The price of new cars in the United States rose from an average of $4,000 in 1970 to
$5,000 in 1978. How would you present this information?
3. What statistics would be most relevant if you were trying to tell your classmates how
they compared to each other on a 50-point examination?
4. Assume that there were 456,786 deaths and 478,269 births in the United States last
year. How would you inform the audience of the growth or decline of the population?
5. A survey shows that 35 of 50 students prefer the quarter system and that the other
15 students prefer the semester system. How would you inform the audience of the
students’ preferences?
6. If the numbers in the following list indicate the number of people in the immediate
7. How would you indicate the variance in temperatures in your state in the last 30
years?
The correct answers to the questions follow. Discuss the answers with the students and
then have them explain the reasons for their own answers. If they disagree or do not
understand the reasons for using one statistic over another, have them answer with
different measures to see which is best understood by the audience. The students
should be able to define each of the statistical terms and to discuss its uses in
summarizing and describing data. They should also be able to point out ways in which
statistics can be used to mislead an audience.