# stat help

by lilyungn
Tags: stat
 P: 9 Hi, I need help understanding how do I use t-distribution to estimate the tα/2 . Also what is meant when it asks "verify your result with empirical rule"
 HW Helper Sci Advisor P: 2,482 Do you understand what α is?
 P: 9 no i dont, what is it?
HW Helper
P: 2,482

## stat help

It is the level of probability to be used for testing. The probability that the result is due to chance.

Do you know what a probability distribution is?
 P: 9 Basically i'm working on a problem that asks that part of the question. I have solved for the population mean, and have different samples with 3 data in them. I calculated the x-bar of those samples with the standard dev and have gotten their confidence intervals.
 HW Helper Sci Advisor P: 2,482 That's all very good; how does your original question about the t distribution relate to the rest?
 P: 9 here is the question: - Find the population mean and its standard deviation - List all possible samples of size 3 from those 5 units - From each sample, compute the mean, standard deviation, and 95% confidence interval. Use t-distribution to estimate the tα/2 because we have a small size.
 P: 300 Questions like this belong in the Homework forum. Please post there next time. Hey, I don't make the rules around here.

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