A 90% confidence interval for the mean has been calculated using a sample size of 20. If the sample size is increased then, all other things remaining constant, the confidence interval will become _. All statistical estimates inherently involve some level of imprecision and some level of uncertainty. Beth has collected a sample from a numerical variable X. She has calculated a sample mean of 6,188. From this, Beth draws the following inference: \"The population mean of X is somewhere between 6,138 and 6,238. ' [n this inference, Beth has: acknowledged the uncertainty but failed to acknowledge the imprecision in statistical estimates acknowledged both the imprecision and the uncertainty in statistical estimates failed to acknowledge both the imprecision and uncertainty in statistical estimates acknowledged the imprecision but failed to acknowledge the uncertainty in statistical estimates OOOO