Study of rare plants that grow on the limestone cliffs
study of rare plants that grow on the limestone cliffs of the Northern Swiss Jura mountains. Data on altitude above sca level (meters), plant population size (number of plants growing), and molecular variance (i.e., the variance in molecular weight of the plants) for a sample of 12 limestone cliffs are reproduced in the table. Recall that the researchers are interested in whether either altitude or population size is related to molecular variance. Population Size Molecular Variance Ciff Number Alitude 147 209 468 59,8 589 24.4 700 28 42.2 59.5 65. 17.7 12.5 27.6 35.9 13.3 3.6 3.2 664 177 876 248 909 1032 952 832 1099 982 1053 114 217 10 15 a. Use simple linear regression to investigate the relationship between molecular variance (y) and altitude (x). Find and interpret the value of r2 b. Use simple linear regression to investigate the relationship between molecular variance (y) and population size (x). Find and interpret the value of r2. c. What are your recommendations to the researchers?
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