Personal identification number (PIN) pads are devices that connect to point-of-sale electronic cash registers for debit and credit card purchases. The PIN pad allows the customer card to be accessed and the PIN encrypted before it is sent to the transaction manager. The Nilson Report (Oct. 2008) listed the volume of PIN pad shipments by manufacturers worldwide in 2007. For the 12 manufacturers listed in the table, a total of 334,039 PIN pads were shipped in 2007 (These data are saved in the PINPADS file.)
Manufacturer Number Shipped (units)
Bitel ................ 13,500
CyberNet .............. 16,200
Fujian Landi ............ 119,000
Glintt (ParaRede) ........... 5,990
Intelligent .............. 4,562
KwangWoo .............. 42,000
Omron .............. 20,000
Pax Tech. ............. 10,072
ProvencoCadmus .......... 20,000
SZZT Electronics .......... 67,300
Toshiba TEC ............. 12,415
Urmet ................ 3,000
a. One of the 334,039 PIN pads is selected and the manufacturer of the pad is determined. What type of data (quantitative or qualitative) is measured?
b. Construct a frequency bar chart for the data summarized in the table.
c. Convert the frequency bar chart, part b, into a Pareto diagram. Interpret the results.
MINITAB Output for Exercise 2.12
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