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9 Cards in this Set
- Front
- Back
What are the requirements for testing a claim about µ with unknown σ?
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1) The sample is a simple random sample.
2) The value of σ is not known. 3)The population is normally distr. OR n > 30. |
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Since σ is not known, what is used instead?
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The sample stdv (s) is used instead.
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With σ unknown, what type of distribution is used?
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t-distribution
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A standard normal distribution has a mean of:
The student t distribution has a mean of: |
A standard normal distribution has a mean of: z = 0
The student t distribution has a mean of: t = 0 |
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The standard normal distribution has a σ of:
The students t distribution has a σ: |
The standard normal distribution has a σ of 1
The students t distribution has a σ > 1 |
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As the sample size gets larger, the students t distribution:
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gets closer to the standard normal distribution.
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When testing a Claim about µ: σ unknown:
How do you find Test stats on the TI/84? |
stat, test, t-test
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When testing a Claim about µ: σ unknown:
How do you find Tcr values on the TI/84? |
2nd, distr, InvT(area to left, df)
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When testing a Claim about µ: σ unknown:
How do you find P-v on the TI/84? |
2nd, distr, tcdf(Ttest & large number, df)
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