Entomology for beginners. Entomology is the study of insects. This page provides some basic information on insects. First we look at the anatomy of adult insects, and then we will see a short story about the metamorphosis of insects. Insect anatomy.
The range rule tells us that the standard deviation of a sample is approximately equal to one fourth of the range of the data. In other words s = (Maximum â Minimum)/4. This is a very straightforward formula to use, and should only be used as a very rough estimate of the standard deviation.
If the value received is on the higher side then that means that your data has a lot of fluctuations and vice versa. To calculate standard deviation in excel we use STDEV function. In the same example we shall use the STDEV function so our formula will be =STDEV(B2:B12). Our answer is around 20 which indicates that the marks of the students fluctuates a lot.