Question 17-20: The following data on calcium content of wheat are consistent with summary quantities that appeared in a recent article on the mineral contents of cereal grains as affected by storage and insect infestation. The experiment considered four different storage times: 0, 1, 2, and 4 months. Storage Period Calcium Content 0 months | 58.75 57.94 | 58.91 | 56.85 || 55.21 | 57.30 1 months 58.87 | 56.43 | 56.51 | 57.67 | 59.75 | 58.48 2 months | 59.13 | 60.38 | 58.01 | 59.95 | 59.51 | 60.34 4 months 62.32 | 58.76 | 60.03 | 59.36| 59.61 | 61.95