Use the given information to find the number of degrees of freedom, the critical values X2L and X2R and the confidence interval estimate of . It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. White blood counts of women 98% confidence; n= 159, s=1.96 (1000 cells/uL). df= __ type an integer X2L = __ (round to two decimal places as needed.) X2R= __ (round to two decimal places as needed.) The confidence interval estimate of is ___ (1000 cells) < < ___ (1000 cells). (Round to two decimal places as needed.)