Hypothesis 2- IQ levels of pupils doesn’t depend on whether they are left or right-handed.

In year 7 the mean IQ is higher for the left-handed (LH) then for the right-handed (RH). In year 9 it is the other way round. In year 11 the means are about the same for both the LH and RH groups. Hence, hypothesis 2 was correct.

Hypothesis 3- There will be a higher number of children with an IQ lower than the mean for their year group; in all years; however there will be some pupils with a high IQ which will increase the mean.

We can see from the Box and Whisker diagrams that in year 7 there are about the same number of children with IQs lower than the mean as children with IQs higher than the mean. In year 9, a bigger proportion of children have IQs higher than the mean IQ. In year 11, it is the other way round. That means hypothesis 3 is not necessarily correct.

Comparison of left-handed and right-handed pupils’ SATs results

Hypothesis 4- LH pupils achieve better results at tests than RH ones, in that they have more results at levels 4 and higher than RH ones.

Year 7

Out of 30 results (10 pupils, 3 results each) left-handed pupils achieved 28 results at levels 4&5, which is slightly more than what right-handed pupils achieved. They achieved 27 results at levels 4&5.

Year 9

The same number (28 out of 30) of LH pupils achieved levels 4 and higher as RH pupils.

Year 11

LH pupils performed worse than RH ones. Only 19 LH pupils achieved levels 4&5, compared to 27 RH ones.

Therefore, we cannot say that LH pupils perform better than RH ones. Hypothesis 4 was incorrect.

Comparison of IQs and SATs results

Hypothesis 5- Generally, the higher the IQ, the higher the levels achieved; but the IQs are not indicators of what levels the pupils will achieve at their SATs.

Year 7

As in the Pre-survey, there seems to be a positive correlation between IQs and SATs results. It is, again, not very strong.

Year 9

We get the same picture as in the Pre-survey. The maths and science graphs follow the same trend as the year 7’s graphs, however the English graph shows that there was almost no correlation between the IQ and English SATs for year 9.

Year 11

The same tendency can be noticed in year 11’s scatter diagrams as in year 7’s.

Which means hypothesis 5 was correct.