Consider summary statistics from three different studies (A, B, C) presented below:

a. Which study provides the least evidence of a significant difference among the group means? Explain your thinking, without performing any calculations or simulations.
b. Which study provides the strongest evidence of a significant difference among the group means? Explain your thinking, without performing any calculations or simulations.

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Sample Sample Study A size Sample SD mean Group 1 10 40 10 Group 2 10 10 30 Group 3 10 20 10 Sample Sample Study B Sample SD size mean Group 1 100 40 10 Group 2 100 30 10 Group 3 100 20 10 Sample size Sample Study C Sample SD mean 10 Group 1 40 12 Group 2 10 30 12 Group 3 10 20 12