vitaminL {LMMstar}

Data From The Vitamin Study (Long Format)

Description

Data from the vitamin Study, a randomized study where the growth of guinea pigs was monitored before and after intake of vitamin E/placebo. The weight of each guinea pig was recorded at the end of week 1, 3, 4, 5, 6, and 7. Vitamin E/placebo is given at the beginning of week 5. This dataset is in the long format (i.e. one line per measurement).

• group: treatment group: vitamin or placebo.

• animal: identifier

• weight1: weight (in g) of the pig at the end of week 1 (before treatment).

• weight3: weight (in g) of the pig at the end of week 3 (before treatment).

• weight4: weight (in g) of the pig at the end of week 4 (before treatment).

• weight5: weight (in g) of the pig at the end of week 5 (after treatment).

• weight6: weight (in g) of the pig at the end of week 6 (after treatment).

• weight7: weight (in g) of the pig at the end of week 7 (after treatment).

Usage

data(vitaminL)

References

Crowder and Hand (1990, p. 27) Analysis of Repeated Measures.