Assignment 3 (due 2/22)

12.3 Adaptation to maternal roles. The key is provided online. Check to make sure students addressed all elements of the problem, which included: (A) Exploration with a boxplot with explicit instructions to report the most salient findings and comment on the outside values (B) Report the ANOVA F, dfs, and P, and (C) the question "".

12.6 Maternal smoking 1. S

(A) Explore the data with a side-by-side boxplot. Below. WebCT reminders that EDA must include interpretation... Group 1 and group 2 have higher averages than groups 3 and 4. The three outside values warrant attention. 

(B) Conduct an ANOVA.

(C) ...discuss your findings. 

• H₀: �₁ = �₂ = �₃ = �₄ versus H₁: at least one population mean differs
• F_stat = 4.15 w/ df₁ = 3 and df₂ = 21
• P = 0.019
• The groups differ significantly.