Midterm notecard

# Midterm notecard - Statistically significant decision would...

• Notes
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Statistically significant – decision would be to reject H 0 Type I error – rejecting H 0 when it is true(going with H 1 when H 0 is true) Type II error – failing to reject H 0 when it is false(going with H 0 when H 1 is true) Significance level – chance of committing Type I error Power – 1-beta Population – entire group of objects under study.Unit – individual object or person in the population(subject).Sample – part of the population used to get info.Size of population – N Size of sample – n Parameter – numerical value using all values of the units in a population.Statistic – numerical value using all the values of the units in a sample Convenience sample - sample consisting of units of the population that are easily accessible. Volunteer sample – sample consisting of those that choose to respond. Both generally biased. Selection bias – tendency to exclude/include certain type of unit. Nonresponse bias – distortions that arise from those that do not respond out of a large sample size. Response bias – distortions that arise b/c of

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• Winter '08
• Veneable
• stratified random sample, Sample Convenience sample, explanatory Retrospective, H0 Type

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