confidence limits can be calculated using -: (A) Mean and range, (B) Mean and standard error, (C) Median and range, (D) Median and standard detion
Answer is D. - the area of either side of mean in normal distribution curve gives the confidence limit. - confidence limit is calculated from mean and standard detion. - 95 percent confidence limits is 2 standard detion added and subtracted from the mean. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:849