Asked by Thano
                The 95% confidence interval is:
(a) Larger than the 99% confidence interval
(b) Smaller than the 99% confidence interval
(c) The same as the 99% confidence interval
            
            
        (a) Larger than the 99% confidence interval
(b) Smaller than the 99% confidence interval
(c) The same as the 99% confidence interval
Answers
                    Answered by
            drwls
            
    It means the range of a variable, centered at the most likely mean value, that the variable is in 95% of the time. The range that the variable is 99% of the time is wider. Therefore the answer is (b)
    
                    Answered by
            Thano
            
    Thanks...
    
                    Answered by
            Thano
            
    So the following would be b as well:
For two normal distributions with the same mean, but different standard deviations, the 95% confidence interval will be:
(a) The same for both distributions
(b) Larger for the distribution with the smaller standard deviation
(c) Smaller for the distribution with the smaller standard deviation
    
For two normal distributions with the same mean, but different standard deviations, the 95% confidence interval will be:
(a) The same for both distributions
(b) Larger for the distribution with the smaller standard deviation
(c) Smaller for the distribution with the smaller standard deviation
                    Answered by
            PsyDAG
            
    95% confidence interval is approximately 2 standard deviations (SDs) away from the mean in each direction (}2 SD). Do you still believe that the 95% confidence interval would be larger for a smaller SD?
I hope this helps. Thanks for asking.
    
I hope this helps. Thanks for asking.
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