A 95% confidence interval for beta is (0.30, 1.10). Which contextual statement is correct?

• A. There is a 95% probability that beta equals a value between 0.30 and 1.10 and so beta is exactly one of those values in 95% of samples.
• B. We are 95% confident the true slope is between 0.30 and 1.10; because the interval excludes zero, this supports evidence of a positive linear relationship in the population.
• C. Because the interval does not include zero, we must conclude the sample slope is biased and cannot be used.
• D. We are 95% confident that 95% of individual predicted responses fall between 0.30 and 1.10.

Answer: (B)