A study has been made on pyrethrumflowers to determine the
Chapter , Problem 19(choose chapter or problem)
A study has been made on pyrethrumflowers to determine the content of pyrethrin, a chemical used in insecticides. Four methods of extracting the chemical are used, and samples are obtained from flowers stored under three conditions: fresh flowers, flowers stored for 1 year, and flowers stored for 1 year but treated. It is assumed that there is no interaction present. The data are as follows: Pyrethrin Content, Percent Storage Method Condition A B C D 1 1.35 1.13 1.06 .98 2 1.40 1.23 1.26 1.22 3 1.49 1.46 1.40 1.35 Suggest a model for the preceding information, and use the data to estimate its parameters.
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