LAB 1 â Biology Lab Skills
LAB 1 â Biology Lab Skills
LAB 1 â Biology Lab Skills
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AP <strong>Biology</strong>—<strong>Lab</strong> 01<br />
Table 12: Class data for our coin flip test.<br />
H/H<br />
H/T<br />
T/T<br />
Total<br />
1 2 3 4 5 6 7 8 9 10 Obs Exp<br />
4. Analyze both the team and class data separately (in Tables 13 and 14) using the Chisquare<br />
analysis as explained below.<br />
A. For your individual team results, complete column A on Table 13 by entering your<br />
observed results in the coin toss exercise.<br />
B. For your individual team results, complete column B on Table 13 by entering your<br />
expected results in the coin toss exercise. In some cases – but not this time – it is<br />
okay if you have to use decimals for fractions (½ = 0.5).<br />
C. For your individual team results, complete column C on Table 13 by calculating the<br />
difference between your observed and expected results.<br />
D. For your individual team results, complete column D on Table 13 by calculating the<br />
square of the difference between your observed and expected results – this is done<br />
to force the result to be a positive number.<br />
E. For your individual team results, complete column E on Table 13 by dividing the<br />
square in column D by the expected results.<br />
F. Calculate the 2 value by summing each of the answers in column E. The symbol<br />
means summation.<br />
G. Repeat these calculations for the full class data and complete Table 14.<br />
H. Enter the ―Degrees of Freedom‖ in Tables 13 and 14 based on the explanation<br />
below the data tables.<br />
Table 13: Chi-square analysis of individual team data.<br />
H/H<br />
A B C D E<br />
obs exp obs – exp (obs – exp) 2 (obs – exp) 2<br />
obs<br />
H/T<br />
T/T<br />
2 total<br />
Degrees of Freedom<br />
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