In an industrial chemistry laboratory, a researcher investigated the effect of two different catalysts on the yield of an organic compound. Using 10 distinct batches of raw material, the researcher conducted a series of reactions. Each batch was split into two equal samples, with one sample processed using Catalyst P and the other using Catalyst Q.

The mass of the purified organic compound yielded (in grams) from each sample was recorded.

Table: Purified compound yield (g) under Catalyst P and Catalyst Q

Batch	Catalyst P	Catalyst Q
1	14.3	15.4
2	15.8	16.9
3	12.1	13.2
4	16.5	17.1
5	13.9	14.8
6	11.2	12.5
7	17.0	18.2
8	10.5	11.9
9	14.6	15.3
10	13.2	14.9

Calculate the mean values for both Catalyst P and Catalyst Q. Show your workings.

The mass of the purified organic compound yielded (in grams) from each sample was recorded.

Table: Purified compound yield (g) under Catalyst P and Catalyst Q

Batch	Catalyst P	Catalyst Q
1	14.3	15.4
2	15.8	16.9
3	12.1	13.2
4	16.5	17.1
5	13.9	14.8
6	11.2	12.5
7	17.0	18.2
8	10.5	11.9
9	14.6	15.3
10	13.2	14.9

Calculate the mean values for both Catalyst P and Catalyst Q. Show your workings.

Data handling and analysis

Question 122

Table: Purified compound yield (g) under Catalyst P and Catalyst Q

Markscheme

Data handling and analysis

Question 122

Table: Purified compound yield (g) under Catalyst P and Catalyst Q

Markscheme

Data handling and analysis

Question 122

Table: Purified compound yield (g) under Catalyst P and Catalyst Q

Data handling and analysis Questions

Data handling and analysis

Question 122

Table: Purified compound yield (g) under Catalyst P and Catalyst Q

Data handling and analysis Questions