To investigate the effect of a toxin on a particular type of insect, six groups of 250 insects in each group were exposed to a certain amount of the toxin. Different groups were exposed to different doses of the toxin. After a while, the number of dead insects in each group was noted. A logistic regression was used to analyze the observations to obtain the following results:

Analysis of Maximum Likelihood Estimates Coefficient DF Estimate SE Coef z-value P-Value Constant 1 -2,664 0,156 -16,94 0,000 Dos - 0,6740 0,0391 17,23 0,000