A coin is thrown until a head occurs and the number X of tosses recorded. After repeating the experiment 256 times, we obtained the following results. Test the hypothesis at, the 0.05 level of significance that the observed distribution of X may be fitted by the geometric distribution g(x; 1/2), x = 1, 2,3,
x = 1 2 3 4 5 6 7 8
y = 136 60 34 12 9 1 3 1