... respectively.
230 Quantitative methods for business Chapter 7
Figure 7. 2
Perfect positive
correlation
6543210
20
10
0
X
Y
242 Quantitative methods for business Chapter 7
a ϭ (∑y Ϫ b∑x)/n ϭ (24 Ϫ (Ϫ0.5 07) 150)/6 ... linear.
232 Quantitative methods for business Chapter 7
Figure 7. 5
Good negative
correlation
6543210
20
10
0
X
Y
Figure 7. 6
Zero correlat...
... 2003
Turnover (£m) 70 22 71 01 73 50 78 44 8249 8598
The values of the Retail Price Index (RPI) for this period were:
Year 1998 1999 2000 2001 2002 2003
RPI 162.9 165.4 170 .3 173 .3 176 .2 181.3
Use the ... £5800 £5200 £5500 £6200 £6000
278 Quantitative methods for business Chapter 8
Note that in the net cash flow column of the table in Example 8 .7
the initial outlay for...
... the poll was biased against the poor and
unemployed, who largely voted for Roosevelt.
478 Quantitative methods for business Chapter 15
15.3.4 Convenience sampling
This method is very simple: samples ... that it may be so long before the results are available that they
are completely out of date. There may be some elements within the
474 Quantitative methods for business...
... a
F
MSB
MSW
284.465
4.684ϭϭ ϭ
60 72 7.
552 Quantitative methods for business Chapter 17
Chapter 17 Statistical inference: population means and bivariate data 569
17. 4 Contingency analysis
To investigate ... represented by the letter E.
570 Quantitative methods for business Chapter 17
Example 17. 17
What results would we expect to see in the contingency table i...
... decimal places.)
Chapter 1 Setting off 31
Quantitative Methods for
Business
Contents
Preface xi
Acknowledgements xiii
Chapter 1 Setting off 1
1.1 Quantitative methods, numbers and business 1
1.2 ... bill for the operatives.
∑
,
x
i
iϭ
2
and explain what your answer means
4
∑
,
Chapter 1 Setting off 29
Preface
Quantitative Methods for Business provides an understa...
... will
76 Quantitative methods for business Chapter 2
66 Quantitative methods for business Chapter 2
The approach to solving a minimization problem is essentially the
same as that we use for a ... Ϫ (Ϫ0.2x) ϭϩ0.1x
200 Ϫ 0 ϭ 200
yx
yx
0.1 200
0.2 0
0.1 200
Ϫϭ
Ϫϭ
ϩϭx
72 Quantitative methods for business Chapter 2
2 .7 Road test: Do they really use
linear pro...
... x,
forming the coefficient, and the power reduced from 2 to 1:
x
2
becomes 2x
2Ϫ1
or simply 2x
This means that for the equation:
y ϭ x
2
88 Quantitative methods for business Chapter 3
82 Quantitative ... at the Kawasaki factory.
Chapter 3 Dealing with curves without going round the bend 101
92 Quantitative methods for business Chapter 3
Example 3.9
The total revenue...
... continuous
114 Quantitative methods for business Chapter 4
132 Quantitative methods for business Chapter 4
25 13 0 13 20 18 13 16 15 0 15 14
15 9 7 14 17 13 3 15 7 23 10 15
Present these data in the form ... test.
The marks for the test (out of 100) for the staff from
Manchester were:
49 53 70 35 55 38 44 79 67 85
67 72 49 62 87 64 67 70 57 63
35 50 58 47...
... location.
188 Quantitative methods for business Chapter 6
Stem and leaf of cost of calls n ϭ 23
09
1 23444
1 555 677 77 899
2 001124
27
Leaf unit ϭ 1.0
The modal value is 17, the leaf digit 7 appears ... cereals were recorded and collated into the following
218 Quantitative methods for business Chapter 6
202 Quantitative methods for business Chapter 6
Example...