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Two Variances - Graphing Calculator definitions

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  • Two-Sample F-Test
    A statistical procedure comparing two population variances or standard deviations using sample data.
  • Variance
    A measure of data spread, calculated as the average squared deviation from the mean.
  • Standard Deviation
    A measure indicating the typical distance of data points from the mean in a dataset.
  • F-Statistic
    A ratio of two sample variances used to assess if population variances differ significantly.
  • P-Value
    A probability quantifying the evidence against the null hypothesis in a statistical test.
  • Null Hypothesis
    A default assumption stating no difference exists between population variances or standard deviations.
  • Alternative Hypothesis
    A claim suggesting one population variance or standard deviation exceeds the other.
  • Alpha Level
    A threshold probability, such as 0.05, used to determine statistical significance in hypothesis testing.
  • Sample Statistics
    Numerical summaries, like sample size and standard deviation, calculated from collected data.
  • Raw Data
    Original, unprocessed values collected from observations or experiments.
  • Right-Tailed Test
    A hypothesis test where the alternative hypothesis claims one variance is greater than the other.
  • Stat Menu
    A calculator interface section for accessing statistical functions, including hypothesis tests.
  • Test Tab
    A calculator menu area where various hypothesis tests, such as the two-sample F-test, are selected.
  • Sample Size
    The number of observations or data points in a sample.
  • Confidence Level
    The probability, often expressed as a percentage, that a statistical conclusion is correct.