Unit 8 Pt 2 Ap Stats

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Ap Stats

15 Terms

1

Confidence Interval

A range of values that is used to estimate the true value of a population parameter.

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2

Critical Value (z*)

A point on the standard Normal distribution that corresponds to a specified level of confidence.

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3

Standard Error

An estimate of the standard deviation of the sampling distribution of a statistic.

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4

Random Condition

The condition that states the sample must be a random sample from the population being studied.

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5

10% Condition

A condition that states the sample size must be less than 10% of the population when sampling without replacement.

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6

Large Counts Condition

A condition that requires both np and n(1-p) to be at least 10 for the sample size to be valid.

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7

Sample Size (n)

The number of observations in a sample; important for estimating the population proportion with a specified margin of error.

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8

Margin of Error (ME)

The range of values above and below the sample statistic in a confidence interval.

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9

One-Sample Z Interval

A method for constructing a confidence interval for a population proportion using the standard normal distribution.

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10

Population Proportion (p)

The true proportion of a particular characteristic in a whole population.

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11

Table A

A reference table used to find critical values for different confidence levels.

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12

Interpretation of Confidence Interval

Describing what the calculated interval means in the context of the data and inference.

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13

Four-Step Process

A systematic method including State, Plan, Do, and Conclude used for constructing and interpreting confidence intervals.

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14

Estimating Sample Size

The process of determining the number of observations required to achieve a desired level of precision in estimates.

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15

Pew Research Center

An organization that conducts studies and reports on various social issues, including reading habits among American adults.

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