Bt is toxic to many of the insects that can disrupt a farming operation. Itâs widely used as a biological pesticide and, in fact, Bt is the most widely used biological pesticide in the world.esearch has shown that the Bt toxin persists in the gastrointestinal tract of human-flora-associated rats weeks after exposure. Research has shown that Bt has a toxic effect on the lungs and other organs. In rare cases, Bt can even wreak havoc on the eyes, causing severe irritation and even blindness.
The most commonly used measure of central tendency is the mean. It is obtained by finding the sum of all data items and then dividing it by the number of items. Use the mean to describe the middle of a set of data that DOES NOT have an outlier.
Common measures of measures of central tendency are Mean, Median and Mode. Compare Dispersion. Definition The mean, median and mode of a set of data are measures of central tendency, i.e. they measure where the 'middle' of the data is. Also cal ed centrality. the range of a given data set is the difference between the largest number and the smal est. number in the data set.