# Question

Perhaps the size of an animal’s brain determines intelligence for that species. Or perhaps the weight of the brain does. Or perhaps body size or weight has a role.The following chart compares several animals’ brain and body sizes and weights.

Calculate the correlation coefficient and use it and Table 10 of Appendix B to determine a 95% confidence interval on r for each of the following cases:

a. Brain length and brain weight

b. Brain length and body weight

c. Brain weight and body weight

Calculate the correlation coefficient and use it and Table 10 of Appendix B to determine a 95% confidence interval on r for each of the following cases:

a. Brain length and brain weight

b. Brain length and body weight

c. Brain weight and body weight

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