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Stat help

by lilyungn
Tags: stat
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lilyungn
#1
Jun21-10, 07:01 PM
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"
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EnumaElish
#2
Jun21-10, 07:06 PM
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Do you understand what α is?
lilyungn
#3
Jun21-10, 07:15 PM
P: 9
no i dont, what is it?

EnumaElish
#4
Jun21-10, 07:29 PM
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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?
lilyungn
#5
Jun21-10, 07:50 PM
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.
EnumaElish
#6
Jun21-10, 08:04 PM
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That's all very good; how does your original question about the t distribution relate to the rest?
lilyungn
#7
Jun21-10, 11:19 PM
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.
moonman239
#8
Jun22-10, 08:58 AM
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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