Inference about a Population - Inference about a Population Mean When the Standard Deviation Is Unknown
3 important questions on Inference about a Population - Inference about a Population Mean When the Standard Deviation Is Unknown
How do you call a statistic where the standard deviation of the population is replaced with the standard deviation of the sample?
t-statistic
How is the t-statistic distributed when the sampled population is normal?
Student t distribution
What is the Student t distribution because when the population is non normal, the results of the t-test and confidence interval estimate are still valid provided that the population is not extremely non normal?
Robust
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