SOCI 217 Lecture : socio217
Document Summary
Jar of 5000 marbles some red some blue = population. aim to find out % of red marbles = parameter. close eyes, shake jar, pick out 1 marble. count number of red marbles in your sample out of 100. check put marbles back, draw second sample. do over and over and then mind mid point of curve = pop. If we only take one random sample mathematically probability theory allows for calculation of how much a sample statistic will deviate from the population parameter size (margin of error) of the sampling error. probability theory allows us to express how confident (confidence level) we are that our sample statistic is close to (confidence interval) the population parameter. I am 95% certain (19 times out of 20) that the jar of marbles contains between 2450 and 2550 red y. Element unit about which information is collected (individuals, tv commercials, clubs, arrests, hugs)
