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Question 1

Suggest how a student could have used his slide to find the number of stomata per cm2 when looking at a leaf under a microscope

Answer 1

use a ruler to determine the area of field of view of the microscope then count number of stomata in field of view. Repeat and calculate the mean

Question 2

Suggest how the scientists should treat a control group.

Answer 2

Exactly the same as the treated group, just with a placebo

Question 3

What information does standard deviation give ?

Answer 3

the spread from the mean