Elementary Statistics for Effective Library and Information Service Management

Leo Egghe, Ronald Rousseau

• Publisher: Routledge
• Year: 2003
• Print ISBN: 9781138439412
• eBook ISBN: 9781135476366
• Edition: 1

This title describes how best to use statistical data to produce professional reports on library activities. The authors cover data gathering, sampling, graphical representation of data and summary statistics from data, and also include a section on trend analysis. A full bibliography and a subject index make this a key title for any information professional..

Appendix 1:
Table of Random Numbers

Appendix 2:
Logic of Calculations

First×and÷(there is no priority between × and÷; any order will do) then+and−(there is no priority between +and−; any order will do). Use of brackets (…) gives priority to the calculations inside the brackets.

Examples

Exercises

Calculate with a pocket calculator (see also Appendix 3 describing universal keys on a pocket calculator).

Note that all • denote decimals. The multiplication sign × is omitted in combination with brackets.

Appendix 3:
Basic Arithmetic on Pocket Calculators

No matter how powerful and cheap personal computers may become, there will always be a need for a pocket calculator. Indeed, for simple arithmetic operations pocket calculators are faster and easier to use. They are relatively cheap and can be used anywhere.

Note that computers usually have a calculator utility, which performs the same operations as a pocket calculator.

There are basically two ways of performing arithmetic operations on a calculator: one based on the usual mathematical notation, and one based on the Polish notation (this system is used by Hewlett-Packard calculators). We begin by explaining the first and simplest method. (Note, though, that some types of calculators may have keys that differ slightly from the ones described here.)

Here the

, and

keys are used as in primary school mathematics, so one presses the keys as follows: 681

27

and the result is shown as 18 387.

Combinations of these elementary operations are possible, as described in Appendix 2. Other keys are

the square root key

the square key

Usually these keys are combined on one button:

9

shows 3;

4

shows 16.

For one of these operations, use the “second function” key

The key

means: 1 divided by the number you key in.

An example: 9

gives 0.1111… 5

3 gives 5³=125

Finally, the

key reverses the sign:

an example: 5

yields −5.

In the system based on the Polish notation there is one big difference: the=is not present (at least not in the sense used above). To perform addition, subtraction, multiplication and division one has to do the following:

: this yields the sum of 5 and 7, which is 12. Similarly,

Appendix 4
List of Notation

Symbol	Explanati...

Table of contents

• Cover
• Title Page
• Copyright
• Contents
• Preface
• Introduction
• Part1: Information about the library
• Part 2: Descriptive statistics
• Part 3: Inferential statistics
• Conclusions
• Appendix 1: Table of random numbers
• Appendix 2: Logic of calculations
• Appendix 3: Basic arithmetic on pocket calculators
• Appendix 4: List of notation
• Bibliography
• Subject index