Economics ECON S - 1920 Chapter Notes - Chapter full summary: Null Hypothesis, Confidence Interval, Statistical Hypothesis Testing
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Suppose you look back at your data set of the number of coffees you purchased per week in the previous questions and realize that your consumption of coffee in Week 2 was both unhealthy and significantly higher than your "normal" coffee consumption behavior. If the 100 cups you consumed is not a good representation of your "population" behavior, what will this do the estimates of the sample mean and sample variance relative to their population values?
Only the sample variance will be biased |
Neither the sample mean nor the variance will be biased |
Both the sample mean and variance will be biased |
Only sample mean will be biased. |