data one;
  input question guess;
  cards;
 7 10
 7 15
 7 9.2
 7 11
 7 28
 7 8.2
 7 10
 7 17
 7 25
 7 32
 7 20
 7 13.5
 7 10
 7 20
 7 20
 7 9
 7 15
 7 8
 7 8.7
 7 8
 7 5
70 35
70 100
70 5
70 25
70 100
70 50
70 65
70 35
70 62
70 100
70 75
70 20
70 30
70 100
70 78
70 60
70 27
;

proc univariate plot data=one;
  var guess;
  by question;
run;

proc ttest data=one;
  class question;
  var guess;
run;

data two; set one;
  y=log(guess);
run;

proc univariate plot data=two;
  var y;
  by question;
run;

proc ttest data=two;
  class question;
  var y;
run;