SOCI 311 Study Guide - Midterm Guide: Confidence Interval, Null Hypothesis, Standard Deviation
16 Nov 2017
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Randoms: no self-selection instead everyone in the population is chosen due to equal opportunity of selection called simple random selection srs (no bias in the study) can infer/generalize to a population value. Bias does not match up population, cause skewness in samples, need to infer to the population by taking our sample statistic and estimate the population parameter. Even if you have sample representative, your sample statistic will be wrong/ not accurate (will not reproduce population parameter) because sampling verifiability. Sampling verifiability: get different sample means in over repeated samples from the same population (what this lesson is about) Margin of error= z* s x with bar. Standard deviation= s (how far on average a score is from the mean) Most important foundation: anytime you take a sample mean even if it representative sample, anytime you take a sample mean will not the population because there are variability in scores / dispersion of scores in any population.
