CRIM 320 Lecture Notes - Lecture 3: Confidence Interval, Interval Estimation, Statistical Inference

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Is it rare enough that it did not occur by chance alone. What are confidence interval and statistical significance? sample distribution: distribution of all possible standard outcomes for statistics. Standard deviation: measures the variability of a statistic. A large number of samples would produce a distribution for the statistic. Standard error: standard deviation of the sampling distribution sampling distribution. Frequency distribution: summary depiction of how many times a particular value of a variable occurs. Sampling distribution: a hypothetical distribution of all possible sample outcomes for a statistic. How likely someone scored that value of outcome in topic of interest. It is the bridge between the sample and the population. Complete distribution of possible outcomes when there are only two possible outcomes. E. g. , yes/no, flipping a coin the normal distribution is a curve defined by a mathematical formula. For continuous variables, infinite number of possible outcomes (interval and ratio) Characteristics make it useful in application to research situations.

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