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Exercise

Tests for two groups

Besides looking at associations between two or more continuous numeric variables, it is also useful to look for associations between a continuous numeric variable and a group variable, such as between abalone length and the dichotomous adult variable in abaloneKeep.

To look at this relationship, in this exercise, you will perform a t-test to determine if there a difference in abalone lengths between infants and adults.

The abaloneKeep dataset, dplyr and ggplot2 packages have been loaded for you.

Instructions 1/3

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Get the sample sizes, means, and standard deviations for length by adult groups in abaloneKeep.