An aerospace components manufacturer is testing the effect of curing temperature on the tensile strength of a new carbon-fibre polymer composite. Ten trial batches were processed under different conditions, and their properties were recorded.

Table 1: Curing temperature and tensile strength for ten polymer batches

Batch	Curing Temperature ( $T$ , $∘C^{\circ}\text{C}$ )	Tensile Strength ( $S$ , $MPa\text{MPa}$ )
1	120	46
2	115	41
3	125	49
4	110	37
5	130	53
6	115	40
7	120	45
8	105	33
9	125	50
10	115	46

How many batches have a Tensile Strength strictly greater than the mean Tensile Strength of the ten batches?

Shade one box only.

Data handling and analysis

Question 60

Markscheme

Data handling and analysis

Question 60

Markscheme

Batch	Curing Temperature ( $T$ , $∘C^{\circ}\text{C}$ )	Tensile Strength ( $S$ , $MPa\text{MPa}$ )
1	120	46
2	115	41
3	125	49
4	110	37
5	130	53
6	115	40
7	120	45
8	105	33
9	125	50
10	115	46

Batch	Curing Temperature ( $T$ , $∘C^{\circ}\text{C}$ )	Tensile Strength ( $S$ , $MPa\text{MPa}$ )
1	120	46
2	115	41
3	125	49
4	110	37
5	130	53
6	115	40
7	120	45
8	105	33
9	125	50
10	115	46

Batch	Curing Temperature ( $T$ , $∘C^{\circ}\text{C}$ )	Tensile Strength ( $S$ , $MPa\text{MPa}$ )
1	120	46
2	115	41
3	125	49
4	110	37
5	130	53
6	115	40
7	120	45
8	105	33
9	125	50
10	115	46

Batch	Curing Temperature ( $T$ , $∘C^{\circ}\text{C}$ )	Tensile Strength ( $S$ , $MPa\text{MPa}$ )
1	120	46
2	115	41
3	125	49
4	110	37
5	130	53
6	115	40
7	120	45
8	105	33
9	125	50
10	115	46

Data handling and analysis

Question 60

Data handling and analysis Questions

Data handling and analysis

Question 60

Data handling and analysis Questions

Batch	Curing Temperature ( $T$ , $∘C^{\circ}\text{C}$ )	Tensile Strength ( $S$ , $MPa\text{MPa}$ )
1	120	46
2	115	41
3	125	49
4	110	37
5	130	53
6	115	40
7	120	45
8	105	33
9	125	50
10	115	46

Batch	Curing Temperature ( $T$ , $∘C^{\circ}\text{C}$ )	Tensile Strength ( $S$ , $MPa\text{MPa}$ )
1	120	46
2	115	41
3	125	49
4	110	37
5	130	53
6	115	40
7	120	45
8	105	33
9	125	50
10	115	46