STAT 1400 Lecture Notes - Lecture 7: Type I And Type Ii Errors, Null Hypothesis, Confidence Interval
Document Summary
Geckos are lizards with specialized toe pads that enable them to easily climb even slick surfaces. Researchers want to know if male and female geckos differ significantly in the size of their toe pads. In a random sample of tokay geckos, they find that the mean toe pad area is 6. 0 cm2 for the males and 5. 3 cm2 for the females. What is the appropriate null hypothesis here? yh. One sided because we just want to see a difference, not greater than or less than. Confidence intervals to test hypotheses: because a two-sided test is symmetric, a confidence interval can be used to test a two-sided hypothesis. 8. 0 g: 227 g belongs to the 95% ci (214. 0 to 230. 0 g). Confidence intervals vs. hypothesis tests: confidence intervals quantify the uncertainty in an estimate of a population parameter, a (cid:272)o(cid:374)fide(cid:374)(cid:272)e i(cid:374)ter(cid:448)al gi(cid:448)es a (cid:271)la(cid:272)k a(cid:374)d (cid:449)hite a(cid:374)s(cid:449)er: reje(cid:272)t or do(cid:374)"t reject h0.
