AP Stats Unit 7
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6 Terms
t-Distribution
A probability distribution used when estimating population parameters when the sample size is small and/or the population standard deviation is unknown
Degrees of Freedom (df)
The number of independent values or quantities which can be assigned to a statistical distribution
One-Sample t-Test
A statistical test used to determine whether the mean of a single sample is significantly different from a known or hypothesized population mean
Two-Sample t-Test
A statistical test used to compare the means of two independent groups to determine if there is a significant difference between them
Paired t-Test
A statistical test used to compare two related samples, such as measurements before and after a treatment on the same subjects
Standard Error of the Mean
An estimate of the standard deviation of the sampling distribution of the sample mea
Note 
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