parietal pleura. The serous membrane that lines the chest cavity; it extends from the mediastinal roots of the lungs and covers the sides of the pericardium to the chest wall and backward to the spine. The visceral and parietal pleural layers are separated only by a lubricating secretion.
The allowableerror is the target value Â± 10%. Using theexample above, the serum cholesterol targetvalue was 200 mg/dL. The total error is 200mg/dL x 0.1 = 20 mg/dL and the acceptabletotal error limits is 180 to 220 mg/dL.First, always determine if within run isacceptable.
where N is the population size, r is the fraction of responses that you are interested in, and Z (c /100) is the critical value for the confidence level c.If you'd like to see how we perform the calculation, view the page source.% is a common choice. %. The margin of error is the amount of error that you can tolerate. If 90% of respondents answer yes, while 10% answer no, you may be able to tolerate a larger amount of error than if the respondents are split 50-50 or 45-55. Lower margin of error requires a larger sample size.