A health care professional wishes to estimate the birth weight of infants. How large a sample must she select if she desires to be 90% confident that the true meanis within 6 ounces of the sample mean? The standard deviationof the birth weights is known to be 8 ounces.
The solution provides step-by-step method for the calculation of sample size. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.