Chapter 8 – Estimation (Confidence Intervals)
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Vocabulary flashcards summarizing the essential confidence-interval formulas and related terms from Chapter 8.
Last updated 2:23 PM on 7/2/25
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6 Terms
1
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Confidence interval for a mean (σ known)
x̄ ± z* (σ / √n)
2
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Confidence interval for a mean (σ unknown)
x̄ ± t* (s / √n)
3
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Confidence interval for a population proportion
p̂ ± z* √[p̂(1 − p̂) / n]
4
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Margin of error (E)
critical value × standard error
5
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Point estimate of μ
sample mean (x̄)
6
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Note 
Flashcards (76)