grouped data merits

Mean deviation is easy to calculate. This measure is simple to understand. This can be calculated from any average. Its value is based upon all the (observations) items of the data. It is less affected by extreme observations. It gives us an idea about how the items are situa..

Merits: s is based on every item of the data. s takes care of both positive and negative deviation. Demerits: s is some what not easy to understand. The extreme values unduly affect s..

Introduction - Today graphics, tables, reasoning, estimation and prediction are playing a very important role in stating the facts in terms of figures. Statistics deals mainly in communicating facts and figures in terms of a method called statistical method. Collection, classification, tabulation, ..

The two-kingdom classification received considerable recognition from biologists and was in use for quite a long period of time. However, as more and more information started emerging on the various groups of plants and animals, this system of classification was found to be inadequate. St..

There are three methods to find mean for a frequency distribution. (i) Direct method: where x is the mid-interval f is the frequency M is the mean (ii) Short-cut method: where A = assumed mean d = x - A (iii) Step-deviation method: where i = class size We illustrate each of these methods w..

(Formation of ethers) - Williamson Synthesis This reaction is called 'Williamson's synthesis' and is quite useful for preparing ethers. Haloalkanes can also be converted into ethers by heating with dry silver oxide. ..

Mrs.Smith has divided all the students in her class into groups. The line plot shows the number of girls in each group. Find the mode of the data shown. => 11 or 5 or 9 or 4..

The tally chart represents the favorite colors of a group of students. Which graph represents the data correctly? => Graph 4 or Graph 2 or Graph 1 or Graph 3..

Identify the incorrect statement(s). I. Percentiles divide the data set into 100 equal groups. II. Deciles divide the distribution into 10 equal groups. III. Quartiles divide the distribution into 25 equal groups. => all are incorrect or I only or II only or ..

>Dotplots, back-to-back stemplots, parallel boxplots Comparing center and spread: within group, between group variation Comparing clusters and gaps Comparing outliners and other unusual features Comparing shapes Exploring bivariate data: Analyzing patterns in scatterpl..