Titlebook: Mastering Statistics with your Microcomputer; Conall Boyle Textbook 1986Latest edition Macmillan Publishers Limited 1986 applied mathemati

节约

异端

Spread ValuesFinding a central measure for your data set is not the end of the story; you also need to gauge whether the values are mostly bunched together, or are widely dispersed. For this you need a measure of spread (also known as a measure of dispersion). To help you, the approach to the topic is mapped out by Fig. 9.1.

Legion

ostrish

foppish

caldron

Store Data on Your Computerrst time. If your knowledge of BASIC is very patchy, then you might find some of the material a bit baffling. But I would expect if you have written even the simplest of programs, that you will take this chapter in your stride!

注视

Manual Recording Of Datathe last time you had a fuse blow on a pencil? I am asking you to look at graphical means of recording data, first because they are useful in making sense of the data, in seeing what the picture is. But secondly, many of these manual techniques arc so good, that it’s worthwhile doing them on the com

并入

Sorting Data Into Order into the structure of prices. You can do this sorting into order by hand, using the stem and leaf plot that you worked out previously in Task 3.4. For instance, if the full digit version of the interval £22 000 (meaning £22 000 and over, and up to £24000) showed;

ALB

雕镂

Middle Values are spread out, and to look at the shape, or symmetry in the distribution. The topic for this chapter is middle values, or central measures to give it its proper name. We are looking for a single value, in the middle, which represents the data set. Because I am going to get you to look at central m