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Question 1

Answer 1

Yes :
Above 100 may be too harmful, higher conc. may be more expensive
No:
Cancer may cont. to spread. It may be between 100-1000 so we need to conduct more trials.

Question 2

When interpreting a graph with error bars to do with effectiveness

Answer 2

Mention if they overlap or don’t. Mention if any concentration reduces risks to 0

Question 3

When talking about what different types of cells

Answer 3

Refer to proportions and percentages

Question 4

“It is dangerous to smoke when a child is in the car. Higher levels of deadly toxins can build up, even on short journeys and children breathe faster than adults .”

Answer 4

Yes : higher conc. of co compared with closed windows this is dangerous since co causes less oxygen to be carried which could be deadly
No : no sig. diff. with open windows as sd overlaps. no data on children’s breathing rate

Question 5

Answer 5

Negative correlation between fibre eaten per day and risk of cardiovascular disease. Correlation doesn’t mean causation. No statistical test to show if differences are significant. If current intake between 5 and 30 then eating 10g more results in a sig. decrease in risk.

Question 6

advantage of a questionnaire over interview

Answer 6

Cost effective and representative if over a long period

Question 7

Answer 7

Question 8

Answer 8

Question 9

For a practical creation

Answer 9

Stat test, make good structure and how will u control the controls

Question 10

Answer 10

Question 11

How to reduce percentage error

Answer 11

One dilution not two

OVER WHATS BEING USED
Graduated pipette
Volumetric flask

Question 12

Validity when temperature

Answer 12

Let it reach the point to allow acclimatise