Standard X-Ray Machines Should Give Radiation Dosages Below 5

Short Answer

Standard X-ray machines should give radiation dosages below 5.00 milliroentgens (mR). To test a certain X-ray machine, a sample of 36 observations is taken, with a mean of 4.13 mR and a population standard deviation of 1.91 mR. Calculate the appropriate test statistic to test the hypotheses using the critical value rule.