11. Answer the following items true or false: a. Researchers that want more certainty must put up with a larger interval b. One way to decrease the interval range is to increase your sample size c. The 95% confidence interval is the most common interval in business statistics d. You can use confidence intervals to test for significant differences between two numbers. e. Overall, variability and sample size are the two biggest factors in calculating confidence intervals. f. If results are highly dispersed, it will be difficult to find significant differences between two competing sets of data. The only way to mitigate this is to increase sample size.