Bring a calculator.

Null hypothesis (H₀): hypothesis of no effect, can be falsified.

Sample mean, standard deviation. See Table 2.1 (p. 13)

Use Student-t-test to compare samples with a normal (bell-shaped) distribution.

• Use equation on page 11 to compute t₀

• Compare with t_c (Appendix 4, 2-tailed test with probability of 0.05).

• If t₀ >= t_c, then H₀ can be rejected.

Section A, Part 1:

• Measure student height (Item 1) and wingspan (Item 2).

• H₀ is that there is no difference between the data pairs.

Section A, Part 2:

• Measure student height and wingspan.

• Homogeneity of variance (s²) between 2 sample means. See Table 2.2 (p. 14)

• Compare F₀ to F_c from Appendix 5 (p. 204).

• If F₀ >= F_c, then H₀ (homogeneity) is rejected, Student-t-test cannot be used.

• H₀ is that there is no difference between the 2 samples.

Section C:

• Rank test of male and female right arm lengths.

• Compute U and U', compare to U_c from Appendix 7 (p. 206).