Question 17 6 pts Find the necessary sample size. Weights of women in one age group are normally distributed with a standard deviation . of 23 lb. A researcher wishes to estimate the mean weight of all women in this age group. Find how large a sample must be drawn in order to be 90 percent confident that the sample mean will not differ from the population mean by more than 2.4 lb. O 249 O 261 O 353 O 247