In the past decade there have been intensive antismoking campaigns sponsored by

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In the past decade there have been intensive antismoking campaigns sponsored by both federal and private agencies. The Behavioral Risk Factor Surveillance System (BRFSS) is an ongoing data collection program that monitors behaviors such as smoking on a statewide level using data collected on a random sample of adults through a telephone survey. The first sample, taken in 1999 in Alaska, involved 2045 adults, of which 592 were current smokers. The second sample, taken in 2009 in Alaska, involved 2411 adults, of which 511 were smokers. The samples are to be compared to determine whether the proportion of U.S. adults in Alaska that smoke declined during the 10-year period between the samples.

What are the sample proportions of adults who were current smokers in 1999 and 2009? (Round your answers to two decimal places.)

p1999 = p2009 =

Explanation / Answer

The first sample, taken in 1999 in Alaska, involved 2045 adults, of which 592 were current smokers.

p 1999 = 592 / 2045 = 0.29

The second sample, taken in 2009 in Alaska, involved 2411 adults, of which 511 were smokers.

p 2009 = 511/2411 = 0.21

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In the past decades there have been intensive antismoking campaigns sponsored by

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