SOC202H1 Study Guide - Midterm Guide: Central Limit Theorem, Confidence Interval, Standard Deviation
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Statistics mathematical characteristics of samples: used to estimate parameters. Sample subset of the population we can use to generalize about the population: samples are drawn according to epsem (equal probability of selection method), meaning every case in the population has the same chance as being selected. Sampling error different random samples will yield different statistics. The standard error gets smaller when you increase sample size. Confidence interval for a mean when is known. Let"s suppose that we conduct a random sample of 350 farmers in peru and we find that they average farm size for all peruvian farmers. Z = 1. 96 has area 0. 0250 beyond it in the normal curve. farm, on average ( ), 26 acres of land. Step 3: (cid:891)(cid:887) % c. i. = (cid:4666) ) Confidence interval for a mean when is is not known. (n = 350) we find a standard deviation (s) of 11. 7. Most of the time, you wont know what sigma is.
