Which of the following does NOT correctly describe how the width of a confidence interval for a population mean changes when the population standard deviation is known? O The interval changes if the sample size decreases. O The interval changes if the sample size increases. O The interval narrows if the sample size increases and confidence level stays the same. O The interval widens if the sample size decreases and the confidence level stays the same. O The interval widens if the sample size stays the same and confidence level decreases.