text: This question is from the Triola textbook, isn't it?!?\n\nIf the average temperature is 98.6 then u = 98.6 is the null hypothesis.\nThe opposite, u not equal to 98.6 is the alternate.\nWe will consider the null hypothesis disproven if your sample falls in the most extreme 1% of values - either the top 0.5% or the bottom 0.5%.\nTo cut 0.5% off the normal curve, use a z-score of +/-2.57.  (We only need -2.57 since the sample mean is below the null hypothesis mean).\nUse a standard deviation of 0.62/sqrt(106)=0.0602\nz = (x-u)/s\n-2.57 = (x-98.6)/0.0602\nx = 98.6 -2.57*0.0602\nx = 98.44\nis the lowest sample mean we would expect from a population with mean 98.6\nSince our sample mean is lower, we do not accept that the population mean is 98.6\nso we reject the null hypothesis.\nThe mean body temperature of healthy adults is not 98.6\n\nAre you at Nobles, by any chance?