Suggested answer to exercise: Locomotor milestones and babywalkers, 3

Question 3: In the table, the P value for the difference in mean time to stand alone was <0.0001. What does this statement mean and what can we conclude?

Suggested answer

This is the result of a significance test. The probability of getting a difference in mean time to stand alone as big as this in a sample would be less than 0.0001 if there were no difference in the population. It tells us that there is very strong evidence that users of babywalkers tend to stand alone later than non-users.

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Last updated: 23 October, 2006.

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