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.
What is the purpose of central tendency measures? It is a measure of the middle or central value of a variable of interest. There are different measures of central tendency and their purposes are not exactly the same. However â¦, the basic principle is that the observed values of the variable are more likely to be near the central tendency value than far from them.