The article "Families of Distributions for Hourly Median Power and Instantaneous Power of Received Radio Signals" (J. of Research for the National Bureau of Standards, 1963: 753-762) suggests the log-normal distribution for x = hourly median power (decibels) of received radio signals transmitted be-tween two cities. Consider the following sample of hourly median power readings: 

  

      

  

a. Is it plausible that these observations were sampled from a normal distribution? 

  

b. Is it plausible that these observations were sampled from a lognormal distribution?
 

2.7 5.4 9.7 22.8 30.5 55.7 66.2 97.3 186.5 240.0