STAT-2126EL Lecture Notes - Lecture 9: Face Card, Random Assignment, Miller Brewing Company
14 Dec 2018
School
Department
Course
Professor
Document Summary
Probability: defined as the likelihood of a given outcome occurring when several outcomes are possible. Probability of a= number of outcomes of a/total number of possible outcomes. 25: what are the odds of getting a face card, 12/52 = 0. 23, what are the odds of drawing a 4 when you hold three 4"s and two other cards, 1/47 =0. 021. Each individual has an equal chance of being selected. There must be sampling with replacement to keep the probability of selection constant for each individual. Random sampling is different than random assignment. You can have a random sample and still bias your results by putting only certain individuals in the control or experimental group. When selecting our subjects we want: random sampling, random assignment, samples that reflect population of interest. What are the odds of rolling snake eyes: 1/36. What are the odds of the dice totaling three: 2/36. What are the odds of the dice totaling seven: 6/36=1/6.
