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\title{The Effect of Vitamin C on Tooth Growth in Guinea Pigs}
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\title{The Effect of Vitamin C on Tooth Growth in Guinea Pigs}
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\description{
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\description{
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  The response is the length of odontoblasts (cells responsible for
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  The response is the length of odontoblasts (cells responsible for
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  tooth growth) in 60 guinea pigs.  Each animal received one of three
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  tooth growth) in 60 guinea pigs.  Each animal received one of three
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  dose levels of vitamin C (0.5, 1, and 2 mg/day) by one of two delivery
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  dose levels of vitamin C (0.5, 1, and 2 mg/day) by one of two delivery
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  methods, (orange juice or ascorbic acid (a form of vitamin C and coded
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  methods, orange juice or ascorbic acid (a form of vitamin C and coded
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  as \code{VC}).
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  as \code{VC}).
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}
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}
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\usage{ToothGrowth}
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\usage{ToothGrowth}
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\format{
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\format{
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  A data frame with 60 observations on 3 variables.
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  A data frame with 60 observations on 3 variables.