This preview shows page 1. Sign up to view the full content.
Unformatted text preview: m Table 1.1 for the first body part.
4. Calculate the (H:HC) ratio for newborns.
5. Follow the same procedure for arm length (H:AL), and record all data in Table 1.2.
6. Enter all data into the class database.
7. Record average ratios using class data in Table 1.4. Biology 6C 13 Table 1.2 Height, Head Circumference and Arm length Measurements for Group _____ and for Newborns. Name of Student Sex
(cm) Head Circumference
(cm) Arm Length
Ratio Newborn Data Please enter your data in the class spreadsheet. Spreadsheet will be posted on-line for use in the next lab. 14 Exercise 1.B. Scientific Investigation: Experimental Design Applied Presenting and Analyzing Results
Once the data are collected, they must be organized and summarized so that scientists can
determine if the hypothesis has been supported or falsified. In this exercise, you will design tables
and graphs; the latter are also called figures. Tables and figures have two primary functions. They
are used (1) to help you analyze and interpret your results and (2) to enhance the clarity with
which you present the work to a reader or viewer.
You have collected data from your experiment in the form of a list of numbers that may appear at
first glance to have little meaning. Look at your data. How could you organize the data set to make
it easier to interpret? You could
the data set for each treatment, but even averages can be
rather uninformative. Could you use a summary table to convey the data (in this case, averages)?
Table 1.3 is an example of a table from the experiment described in the pre-lab using data
averages of the number of seeds per pod and number of pods per plant as the dependent
variables and exposure to sulfur dioxide as the independent variable. Note that the number of
replicates and the units of measure are provided in the table and in the legend.
Table 1.3 Effects of 4-Hour Exposure to 0.6 ppm Sulfur Dioxide
on Average Seed and Pod...
View Full Document