1.Test the hypotesis that there is no significant correlation between mental ability ad English proficiency at 5 % level of significance

2.Ten instructors were rated by third- and fourth year students on their " Mastery of the subject matter" and te results were tabulated. What is te spearman rho value for the data? At 5 % level of significance ,determine if there is a significant difference in the score obtained by the teachers.

Table 9.1

Mental Ability and English Proficiency Test Scores

Mental Ability (x)

50
54
50
51
49
46
48
47
44
44
46
45
48
53
54
33
34
English Proficiency (y)
200
198
200
203
186
205
185
197
183
171
179
185
184
190
191
170
168




Significant level
One Tailed a %1= 2.326
Two Tailed a %1= 2.575

One-Tailed a %2.5=1.960
Two-Tailed a %2.5=2.326

One-Tailed a %5=1.645
Two-Tailed a %5=1.960

One-Tailed a %10=1.280
Two-Tailed a %10=1.645