Model Answers for Homework # 3

siberiaskeinΔιαχείριση Δεδομένων

20 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

193 εμφανίσεις


Model Answers for Homework # 3

Q
uestion
6

Page 20
: With the help of this diagram, sequence these steps in the operation of an EPOS
till. Then write a description of its operation in the present passive.





The item is scanned
.


1/ (f)

2/ (c) The
barcode is read
.

3/ (a) The barcode is converted into electrical pulses.

4/ (g) The pulses are sent to the branch computer.

5/ (i) The stock file

is

searched for a product matching t
he barcode EAN.

6/ (d) The sale of the product is recorded by the branch c
omputer.

7/ (b) The price and description of the product are sent to the EPOS till.

8/ (e) The item and price are showed by the till.

9/ (h) The item and price are printed on the paper receipt.



Q
uestion p
art
(
B
) from the specialist reading

Page 2
3
:

1/ (a iii)


(b


iv)


(c




ii)


(d




i)


2/ (a

F
alse )


(b

True)



(c
True)


(d

T
rue)



(e


F
alse)



3/ Complete the following description of the data mining process using words from the text:

Large amounts of data stored in data
warehou
ses

are often used for data
mining
. The data is first
cleansed

to
remove
duplicate
information and errors . The
data

is then analysed using a tool such as
artificial intelligence

. An analysis
report is then anal
ysed by an
analyst
who decides if the
parameters

need to be refined, other
data
analysis

tools need to be used, or if the results need to be discarded because they are
unusable
. The
analyst passes the final result
s

to the
decision

makers who decide on the
appropriate

action.