The utility company in the city of Harperville serves 20,000 residential addresses.  The company wants to gauge interest in a “Beat the Peak” program which offers consumers a discount in exchange for limited electricity usage during peak hours.  Unknown to the utility company, 18% of its 20,000 residential customers would participate in such a program. Since the company does not know the level of interest among its customers, the company selects every 40th account from an alphabetical listing of residential account holders, starting with the 23rd name.  Of the 500 subscribers selected, 16% express interest in the “Beat the Peak” program.   1a) What type of sampling did the utility company employ? A. simple random sample B. systematic C. cluster D. stratified E. Voluntary response

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The utility company in the city of Harperville serves 20,000 residential addresses.  The company wants to gauge interest in a “Beat the Peak” program which offers consumers a discount in exchange for limited electricity usage during peak hours.  Unknown to the utility company, 18% of its 20,000 residential customers would participate in such a program.

Since the company does not know the level of interest among its customers, the company selects every 40th account from an alphabetical listing of residential account holders, starting with the 23rd name.  Of the 500 subscribers selected, 16% express interest in the “Beat the Peak” program.

 

1a) What type of sampling did the utility company employ?

A. simple random sample

B. systematic

C. cluster

D. stratified

E. Voluntary response

F. Convenience

G. Judgement

 

2b) The utility company divides its service area into 5 zones.  If the company had randomly selected 100 customers from each zone, which type of sampling would they have employed?

A. simple random sample

B. systematic

C. cluster

D. stratified

E. Voluntary response

F. Convenience

G. Judgement

1c) If the company had randomly selected 500 addresses from all residual addresses, which type of sampling would they have employed?

A. simple random sample

B. systematic

C. cluster

D. stratified

E. Voluntary response

F. Convenience

G. Judgement

 

1d) If the company had randomly selected 50 neighborhoods within its service area and solicited opinions from every customer in those neighborhoods, which type of sampling would they have employed?

A. simple random sample

B. systematic

C. cluster

D. stratified

E. Voluntary response

F. Convenience

G. Judgement

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