For the 41 nations that participated in the exam the correla

For the 41 nations that participated in the exam, the correlation between the percentage of items answered in the background questionaire and mean score on the exam was 0.78

Does this suggest there is a linear persistance and achievement score?

a) yes since 0.78 is less than the critical value of 30

b) no since 0.78 is greater than critical value of 30

c) no since 0.78 is less than critical value of 30

d) yes since 0.78 is greater than critical value of 30

What does this result mean?

a) Countries in which students cheated on the exam also cheated on the items in the background questionaire

b) countries in which students answered a greater percentage of items in the background

c) There is no linear relation between countries in which students answered a greater percentage of items in the background questionaire and higher mean scores on the exam

d) countries in which students answered a lesser percentage of items in the background questionaire tended to have higher mean scores on the exam

Solution

c) no since 0.78 is less than critical value of 30

b) countries in which students answered a greater percentage of items in the background