Name:_____________________________
Date:______________________________
Semester:____________
Banker
Lab 3: Scientific Method
Practical 1
Reading: There is nothing in the book for this, so just use my power point for the reading, figures, and tables.
Figures:
Tables:
Define: (separate sheet of paper)
Scientific Method
Statistics
Controlled Experiment
Theory
Observations
Law
Hypothesis
Analysis of Data
Lab:
This exercise is to test the observed correlation between the upper and lower limb length of individuals when compared with their height. In this class
we will be measuring upper limb length and comparing the measured percentage of total body length with the expected percentage (40%, 0.40). This
will allow us to see how closely people in the class match the values predicted by researchers.
Hypothesis: Upper limb length of a normal human is 40% (0.04) of their total body height.
1.
2.
3.
Using a meter stick, measure the upper limb (arm) of a person in the class. Measure from shoulder to the tip of the middle finger.
Using a meter stick, measure the total body height of the person from the soles of the feet to the top of the head.
After recording your results in the chart provided below, repeat steps 1 and 2 on 5-10 people in the class.
Results:
Subject
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Height (cm)
Upper Limb Length (cm)
(measured)
Upper Limb Length (expected)
Body Heightx0.4
Percentage of Height
(measured)
Upper Limb Length/Height
Questions:
1. Graph the data you collected in today’s experiment. The red line represents the expected percentage of upper limb length to body height (0.40).
After graphing the data draw a line of “best fit” ( a single, straight line that is closest to all the data points).
2. How did your line of best fit compare with the red line? (If all your subjects had a prfect 0.40 ratio, then the red line would have been the line of best
fit).
3. Do your data points support or not support the original hypothesis?