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Math
Statistics
Statistics Week 8 and 9
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Terms in this set (10)
The t-distribution is used when the exact value of the population standard deviation is known.
False.
The independence condition required for using the Central Limit Theorem can be satisfied if the data come from a random sampling process.
True.
The t-distribution is bell-shaped like the normal distribution, but it has tails that are __?__ indicating that observations are more likely to fall beyond two standard deviations from the mean.
Thicker.
In a t-distribution, the degrees of freedom describe the __?__ of the t-distribution.
Shape.
As sample size increases, the t-distribution approaches the standard normal distribution.
True.
When using the t-distribution, the population standard deviation is used to calculate the sampling error (SE).
False.
Paired data is data that has a special __?__ between data pairs.
Correspondence.
When analyzing paired data, it's useful to consider the difference in outcome of each pair of observations.
True.
When performing a t-test for a single mean with sample size 28, the degrees of freedom would be __?__.
27.
ANOVA is a process that allows one to compare means across many groups.
True.
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