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Stats problems, have work and answer shown

  1. Nov 6, 2008 #1
    1. The problem statement, all variables and given/known data
    the q is , Sheilas measure glucose level one hour after a sugary drink varies according to the normal distribution (u= 125 mg/dl) and r=10 mg/dl. What is the level L such that there is a probability only 0.05 that the mean glucose level of 4 test results falls above L?

    2. Relevant equations
    i used x= u(mew) + z * r

    3. The attempt at a solutionI did a backwards normal calculation of x= 125 + .5199 (from table A probs) * 10 = 130.199

    i think its right but i dunno, does the 4 play a part in my equation or is this the wrong way to do it? ANY information would be helpful
  2. jcsd
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