ACTIVITY 5.2 Age and Flexibility Materials needed: Yardsticks. the students in y
ID: 3364005 • Letter: A
Question
ACTIVITY 5.2 Age and Flexibility Materials needed: Yardsticks. the students in your class as the subjects for your study? In this activity, you will investigate the relationship between age and a measure of flexibility. Flexibility will be measured by asking a person to bend at the waist as far as possible, extending his or her arms toward the floor. Using a yardstick, measure the distance from the 2. Working as a class, decide on a reasonable way to collect data on the two variables of interest 3. After your class has collected appropriate data, use them to construct a scatterplot. Comment on the interesting features of the plot. Does it look like there is a relationship between age and flexibility? floor to the fingertip closest to the floor. 1. Age and the measure of Rexibility just described will be measured for a group of individuals. Our goal is mine whether there is a relationship between age and this measure of lexibility. What are two reasons why it would not be a good idea to use just 4. If there appears to be a relationship between age and flexibility, fit a model that is appropriate for describ- ing the relationship. In the context of this activity, write a brief description of the danger of extrapolation. to deter 5.Explanation / Answer
1. The main reasons for not considering the only the students of your class are:
2. A reasonable way to collect data on the variables of interest may be as follows:
For age, we may first make some classes of same width of ages viz. 10-15, 16-20, 20-25, 26-30, 30-35, 36-40, … … …, 55-60. Now find people falling in these age groups and count their frequencies corresponding to each group and their mean measure of flexibility.
3. Next plot the collected data and prepare a scatter plot. If the plot show any trend of association then we may start building up the relationship model.
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