Problem

PIN pad shipments. Personal identification number (PIN) pads are devices that connect to p...

PIN pad shipments. 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

Based on The Nilson Report , No. 913, Oct. 2008 (p. 9).

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.