S

AMP

LING AND

S

AMPLE

S

IZE

P

RACTICUM

$1.$

The Nevada National Bank, headquartered in Las Vegas, has some $400,000$ users of its credit card scattered

throughout the state. The application forms for the credit card ask for the usual information about name,

address,

phone, income, education, and so on that is typical of such applications. The bank is interested in

determining if there is any relationship between the uses of the card and the socioeconomic characteristics

of the user; e$.$g$.,$ is there a difference in the

characteristics of those people who use the credit card for major

purchases only $($e$.$g$.,$ appliances$),$ and those who use it for minor as well as major purchases?

a$.$

Identify the

target

population and the sampling frame that would be used by the bank.

b$.$

Indic

ate how you would draw a simple random sample from the sampling frame identified in

$($

a

$)$

$.$

c$.$

Indicate how you would draw a

stratified

sample from the sampling frame.

d$.$

Indicate how you would draw a

systematic

random

sample from the sampling frame.

e$.$

Whic

h method would be preferred? Why?