A volcanologist, Dr. Vance, monitored the activity of an active volcano to assess changes in its status. Over the course of one week, she recorded the daily average seismic tremor amplitude (in micrometres, $μm\mu\text{m}$ ) and the daily sulphur dioxide ( $SO2\text{SO}_2$ ) emissions (in kilotonnes).

Table 1: Volcanic activity measurements over one week

	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Daily average seismic tremor amplitude ( $μm\mu\text{m}$ )	14.5	18.2	12.1	16.8	22.0	15.4	13.9
Daily sulphur dioxide emission (kilotonnes)	2.3	3.1	1.8	2.9	3.5	2.1	1.9

Calculate the mean daily sulphur dioxide emission for this week. Show your workings.

Give your answer to two significant figures.

Table 1: Volcanic activity measurements over one week

	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Daily average seismic tremor amplitude ( $μm\mu\text{m}$ )	14.5	18.2	12.1	16.8	22.0	15.4	13.9
Daily sulphur dioxide emission (kilotonnes)	2.3	3.1	1.8	2.9	3.5	2.1	1.9

Calculate the mean daily sulphur dioxide emission for this week. Show your workings.

Give your answer to two significant figures.

Data handling and analysis

Question 62

Table 1: Volcanic activity measurements over one week

Markscheme

Data handling and analysis

Question 62

Table 1: Volcanic activity measurements over one week

Markscheme

Data handling and analysis

Question 62

Table 1: Volcanic activity measurements over one week

Data handling and analysis Questions

Data handling and analysis

Question 62

Table 1: Volcanic activity measurements over one week

Data handling and analysis Questions