An article in the journal of sports science (1987, vol. 5, pp. 261-271) presents the results of an investigation of the hemoglobin level of canadian olympic ice hockey players. a random sample of 20 players is selected and the hemoglobin level is measured. the resulting sample mean and standard deviation(g/dl) are and use this information to calculate a 95% two-sided confidence interval on the mean hemoglobin level and a 95% two-sided confidence interval on the variance. assume the data are normally distributed.