2 Statistics Lab
Bring a calculator.
Null hypothesis (H
): hypothesis of no effect, can be
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 t
Compare with t
(Appendix 4, 2-tailed test with probability of 0.05).
, then H
can be rejected.
Section A, Part 1
Measure student height (Item 1) and wingspan (Item 2).
is that there is no difference between the data pairs.
Section A, Part 2
Measure student height and wingspan.
Homogeneity of variance (s
) between 2 sample means. See Table 2.2 (p. 14)
from Appendix 5 (p. 204).
, then H
(homogeneity) is rejected, Student-t-test cannot be used.
is that there is no difference between the 2 samples.
Rank test of male and female right arm lengths.
Compute U and U', compare to U
from Appendix 7 (p. 206).
Lab notes made Aug 29, 2006 by