The calcium data frame has 27 rows and 2 columns.
Howard Grimes from the Botany Department, North Carolina State University, conducted an experiment for biochemical analysis of intracellular storage and transport of calcium across plasma membrane. Cells were suspended in a solution of radioactive calcium for a certain length of time and then the amount of radioactive calcium that was absorbed by the cells was measured. The experiment was repeated independently with 9 different times of suspension each replicated 3 times.
calciumThis data frame contains the following columns:
timeThe time (in minutes) that the cells were suspended in the solution.
calThe amount of calcium uptake (nmoles/mg).
Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.