BIO SCI 100 Midterm: 9
25 Mar 2017
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Null hypo:no diff b/w pop mean(u) of 2 pop. u1=u2, test hypo:calc probability that 2 sample came from same pop. Alt hypo=yes height diff (2 tailed). 1 tail:m/f height more: central limit theorem: sampling dist of any stat is normal if sample size is large enough. 2 tailed: no direction: u1 diff than u2. Independent group: 2 sample: b/w subject/ randomly assigned to 2 assay conditions. Before and after treatments: one sample t test: compare group results to a known standard, anova: t-test compare b/w 2 group not to compare 2 or more group. Two way= > 1 indep grouping factorial: > 1 indep variable. Don"t use pairwise test b/c of type 1 error risk: descriptive stat(mean): describe avg of data.
