1a) Write a datastep in SAS to read in the antibiotics data from the 
file "antibiotics.dat1" and write them to a dataset in the tall and skinny
format (with 20 observations, and for each observation, a value for
two variables: 

* binding fraction, "y"
* antibiotic

To achieve this, make use of a single trailing @ within a do-loop which 
iterates over the columns of the text file separately for each row. 

1b) Read in the antibiotics data from the file "antibiotics.dat2"
Is there a problem posed by the fact that the field containing the
antibiotic character string comes after the binding fractions?  
Create an array which strings together the four binding fractions

2) Obtain the ANOVA table which breaks up total variability into
independent components which reflect between and within antibiotic
variability:
SS[Tot] = SS[antibiotic] + SS[Error]

3) Obtain the estimated regression coefficients when binding fraction
is regressed on indicator variables for the first four antibiotics
(adopting the mean for the last antibiotic as the "intercept" in the
regression.)