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STATS Terms

QuestionAnswer
Sample Mean Average sample of people (x bar)
Sample proportion observed proportion, percentage of people surveyed in study (p hat)
Standard Deviation Measure of spread or variability for a data set
Parameter Describes population (long run)
Statistic Describes smaller sample of the population
Population mean The true average of all people
Population Proportion Exact percentage of all people
Population Standard Deviation The true measure of spread or variation for an entire population
Null Hypothesis (Ho) Probability of chance
Alternative Hypothesis (Ha) Probability that something is going on besides chance
Standardized Statistic Z score (statistic- mean of null distribution/SD of null distribution)
Statistically significant P hat= 0.05 Z score= +- 2 SD
Created by: user-2010837
 

 



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