Press the Distribution Menu (2"" key, then VARS) and using the following functions: To find a percentile given an observation, use normaldi Lower Bound, Upper Bound, Mean, Standard Deviation) For left-tailed areas use - 99999 as the lower DISTR DRAW bound. For right-talled areas use 99999 as the 1 : normalpdfc 2:normalcdfc upper bound. : invNorm 4:tpdf 5: t.cdf 6:X3Pdf( IXzodf( To find an observation given a percentile, use InvNorm( Percentile, Mean, Standard Deviation) Remember, the percentile is the left tail DISTE DRAW 1 : normalpdf area for the value that you want. So 2:normalodfo invNorm SBinvNorms 4: tpdf 5: todfo 6:Xzpdf( IXzedf( always requires left tail area 1. What proportion of adults slept longer than you did? 2. How long did the person who slept the least in your data set ( other than you) sleep? I. What is the probability that a randomly selected adult slept less than this dersong