Using α =

question 31

Multiple Choice

Using α = .04, a confidence interval for a population proportion is determined to be .65 to .75. If the level of significance is decreased, the interval for the population proportion _____.

• A) becomes narrower
• B) becomes wider
• C) does not change
• D) Not enough information is provided to answer this question.

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Definitions:

Moving Averages

A method used in time series analysis to smooth out short-term fluctuations and highlight long-term trends by averaging data points over specific periods.

Exponential Smoothing

A method used in time series forecasting that applies decreasing weights to past observations.

3-year Moving Averages

A method to smooth out data over a three-year period to identify trends and patterns.

Seasonal Variation

Refers to periodic fluctuations in data or variables that occur at or depend on specific times of the year.