Asked by Lacey Johnson on Jun 26, 2024
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The t-distribution allows the calculation of confidence intervals for means for small samples when the population variance is not known, regardless of the shape of the distribution in the population.
T-Distribution
A probability distribution used in statistics for estimating population parameters when the sample size is small and the population variance is unknown.
Confidence Intervals
A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter, expressed with a certain level of confidence.
Population Variance
A measure of the spread of a population's values, calculated as the average squared deviation from the population mean.
- Separate the characteristics of t-distribution from those of the normal distribution, and understand the criteria for their respective uses.
- Understand how sample size affects the estimation precision and hypothesis testing.
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Learning Objectives
- Separate the characteristics of t-distribution from those of the normal distribution, and understand the criteria for their respective uses.
- Understand how sample size affects the estimation precision and hypothesis testing.
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