Exercise

Median lengths of pregnancies for smoking and non-smoking mothers

Let's turn our attention to another variable, weeks, indicating the length of the pregnancy. Construct a bootstrap interval for the difference in median lengths of pregnancies of smoker and non-smoker mothers.

Instructions 1/3

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Filter ncbirths for rows where smoking habit and length of pregnancy in weeks are both non-missing.

.css-6su6fj{-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;}Exercise

Instructions 1/3

Exercise