Question 2: Report these to two decimal places.
Mean = 0.5059
Standard deviation = 0.21914
Variance = 0.048
To two decimal places these are:
Mean = 0.51 mmol/L
Standard deviation = 0.22 mmol/L
Variance = 0.05 mmol/L
In each case, the third decimal place is 5 or more, so we round up.
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