QUEStIOH 10 2 points Save Answer Consider the following statements concerning confidence interval estimates: A. The use of the pooled variance estimator when constructing a confidence interval for the difference between means requires the assumption that the population variances are equal. B. The width of a confidence interval estimate for the proportion, or for the mean when the population standard deviation is known, is inversely proportional to the square root of the sample size (i.e. increasing one decreases the other). C. To determine the sample size required to achieve the desired interval width in the confidence interval estimate for the mean where the standard deviation is known, the critical value for the standard normal distribution lie 2 value) is required. C) only A is true C) only Aand B are true C) only A and C are true 0 only B and C are true O A, B and C are true Moving to another question Will save this response.