Ch. 6 and 7 Review

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True or False: When finding sample size, if n = 169.5 I should always round down n = 169.

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False

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CCSS.HSS.IC.B.4

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True or False: As sample size increases the Margin of Error decreases.

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True

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CCSS.HSS.IC.B.4

Front

Calculate the sample size needed for a margin of error of 1% at the 99% confidence level.

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CCSS.HSS.IC.B.4

Front

A study wants to find the proportion of adults who like cake. 1000 people were surveyed, and 898 people were found to like cake. Calculate a 98% confidence interval.

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CCSS.HSS.IC.B.4

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Why do we use a t-distribution instead of a z-distribution for means?

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It reflects greater variability present in small samples.

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CCSS.HSS.ID.A.4

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Define sample size in the context of statistical studies.

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Sample size refers to the number of observations or data points collected in a study, which affects the accuracy and reliability of the results.

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CCSS.HSS.IC.B.3

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What is the Margin of Error in statistics?

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The Margin of Error is a measure of the uncertainty in a survey's results, indicating the range within which the true population parameter is expected to fall.

Tags

CCSS.HSS.IC.B.4

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Explain the concept of confidence level in statistics.

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The confidence level represents the probability that the confidence interval contains the true population parameter, commonly expressed as a percentage (e.g., 95% confidence level).

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CCSS.HSS.IC.B.4

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What is the difference between a t-distribution and a z-distribution?

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A t-distribution is used for smaller sample sizes and has heavier tails, reflecting greater variability, while a z-distribution is used for larger samples and assumes a normal distribution.

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How do you calculate a confidence interval for a proportion?

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Tags

CCSS.HSS.IC.B.4