Download Aggregate index 125 Approximation and rounding 59, 70 Averages

Index
Aggregate index 125
Approximation and rounding 59, 70
Averages 99
Bar chart 10
comparative 13
dual 13
sectional/composite 16
sectional percentage 18
Bivariate data 218
correlation 218
scatter diagrams 219, 225
Box-and-whisker diagrams 145
Boxplots, see box-and-whisker diagrams
Census 39
Central tendency, measures of 99
for derived distributions 174
features of 116
for grouped data 106
for ungrouped data 99
Centred moving averages 235
Class interval 58
Class measures 58, 70
Class mid-value 58
Closed questions 41
Combined events 192
dependent events and conditional
probability 200
independent events 192
Combining sets of data 118
Comparative bar charts 13
Comparative pie charts 25
Complement of the union 187
Conditional probability, dependent
events and 200
Continuous data 69, 73
approximation and rounding 70
class measures 70
cumulative frequency diagrams 92
histograms and frequency polygons 74, 82
Continuous variables 56
Correlation 218
Cost of living index 123
Crude rates 128
Cumulative frequency diagrams 92, 151
quartiles, deciles and percentiles 151
Cumulative frequency distributions 68
Cumulative frequency table, linear interpolation
from 159
Data 2
pictorial representation of 8
summary and display of 2
Data collection 39
conducting a survey 40
sample, types of 44
surveys 39
Deciles 151
Dependent events and conditional probability 200
Dependent variable 220
Derived distributions
measures of central tendency for 174
measures of dispersion for 177
Deviations 241
Discrete random variable 211
Discrete variables 55
Dispersion, measures of 138
for combined sets of data 170
cumulative frequency diagrams 151
for derived distributions 177
features of 166
interquartile range 140
linear interpolation from cumulative
frequency table 159
range 139
standard deviation and variance 164
Dual bar chart 13
277
Index
Equally likely outcomes 33
Even-pointed moving averages 235
Events 32
Exhaustive outcomes 34
Expectation 35, 208, 211, 212
fair games and expected winnings 214
probability distributions 211
Expected winnings, fair games and 214
Experiments, events and outcomes 32
Extrapolation 220
Fair game 214
and expected winnings 214
Frequency distributions 5, 58
Frequency polygons 77, 84
Grouped data 54
continuous data 69, 73
continuous variables 56
discrete variables 55
grouped discrete data 58
qualitative variables 55
quantitative variables 55
Grouped discrete data 58
approximation and rounding 59
class measures 58
cumulative frequency distributions 66
frequency distributions 58
stem-and-leaf diagrams
(stemplots) 63
Histograms and frequency polygons
for equal class intervals 74
for unequal class intervals 82
Independent events 192
Independent variable 220
Index numbers 120
price relatives 121
simple combined 123
weighted aggregate 125
Interpolation 220
Interquartile range 141, 166
box-and-whisker diagrams 145
for grouped data 144
stem-and-leaf diagrams 144
for ungrouped data 141
Intersection of the sets 187
Linear interpolation from cumulative
frequency table 159
278
Linear transformation of data 174
derived distributions 174, 177
scaling 180
Line graphs 22
Line of best fit, on scatter diagram 219, 221
Mean 99
calculating an estimate of 106
Mean seasonal variation 241
Median 101
cumulative frequency diagram, estimation
from 109
Mode/modal class 101, 107
Moving averages 235
centred 235
Mutually exclusive events 185
Venn diagrams 187
Open questions 41
Outcomes
equally likely 33
exhaustive 34
experiments, events and 32
Percentiles 151
Pictograms 9
Pictorial representation of data 8
bar charts 10
comparative bar charts 13
comparative pie charts 25
dual bar chart 13
line graphs 22
pictograms 9
pie charts 24
sectional/composite bar charts 16
sectional percentage bar charts 18
Venn diagrams 28
Pie charts 24
comparative 25
Price relatives 121
Probability 32
equally likely outcomes 33
exhaustive outcomes 34
experiments, events and outcomes 32
random selections 33
trials and expectation 35
Probability and expectation 185
combined events 192
expectation 208
mutually exclusive events 185
Probability distributions 211
Index
Qualitative variables 55
Quantitative variables 55
Quartiles 151
Questionnaires 41
Quota samples 47
Random samples, simple 44
Random selections 33
Range 139, 166
Raw data 2
Rounding, approximation and 70
Sample 39, 44
bias in 47
error 40
frame 40
quota 47
simple random 44
stratified random 46
surveys 39
systematic 45
Scaling 180
standard scores 181
Scatter diagram 219, 225
independent and dependent variables 220
interpolation and extrapolation 220
line of best fit on 221
Scatter graph, see scatter diagram
Seasonal components
Seasonal variation 233
mean 241
Sectional/composite bar charts 16
Sectional percentage bar charts 18
Selections, random 33
Simple combined index numbers 123
Stake 214
Standard deviation 164, 167
Standardised rates 131
Stem-and-leaf diagrams 63, 144
Stratified random samples 46
Surveys 39
census 39
conducting 40
open and closed questions 41
questionnaires 41
sample surveys 40
Systematic samples 45
Tables
two-way 2, 193, 201
Time series 229
centred moving averages 235
graph 22
mean seasonal variation 241
seasonal components
seasonal variation 233
trend line and moving averages 233
variation and trend 229
Tree diagrams 194, 195, 201
Trend 229
Trend line 233
Trials 35
Two-way tables 193, 201
Ungrouped data 2
Union of the sets 187
Universal set 187
Variable 54
continuous 56
discrete 55
expectation of 211
qualitative 55
quantitative 55
Variance 164
Variation 229
seasonal 233
Venn diagrams 28, 187
Vertical line graph 22
Weighted aggregate index numbers 125
Weighted averages 119
combining sets of data 118
crude rates 128
index numbers 123
standardised rates 128
Winnings 214
279