What Is the Relationship Between the Size of a Sample

question 76

Multiple Choice

What is the relationship between the size of a sample and the width of the confidence interval for the mean?

• A) The smaller the sample size, the narrower the confidence interval for the mean.
• B) The larger the sample size, the narrower the confidence interval for the mean.
• C) The larger the sample size, the wider the confidence interval for the mean.
• D) The size of the sample has no influence on the width of the confidence interval for the mean.

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Definitions:

Seasonal Effect

A periodic effect that recurs or fluctuates in a predictable pattern over a year due to the change in seasons.

Time Series

A sequence of data points collected or recorded at successive time intervals, often analyzed to identify trends, cycles, and forecasts.

Moving Average Model

A statistical model used for forecasting future values based on past averages of data points.

Three-period Moving Average

A method of smoothing time series data by calculating the average of three consecutive values at a time.