Model Answers for Homework # 3
: 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
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
searched for a product matching t
he barcode EAN.
6/ (d) The sale of the product is recorded by the branch c
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.
) from the specialist reading
1/ (a iii)
3/ Complete the following description of the data mining process using words from the text:
Large amounts of data stored in data
are often used for data
. The data is first
information and errors . The
is then analysed using a tool such as
. An analysis
report is then anal
ysed by an
who decides if the
need to be refined, other
tools need to be used, or if the results need to be discarded because they are
analyst passes the final result
makers who decide on the