# 3 DATA COLLECTION

# 3.1 Survey Fielding Period

The survey began on September 16 and closed on September 24, 2009.

# 3.2 Response Rate

The overall response rate was 13 percent for the CEE 2009 ENERGY STAR Household Survey. This level of response is typical for Knowledge Networks’ surveys.

For an Internet/WebTV survey, the response rate is defined as the product of the return rate, which is survey-specific, and the recruitment rate. The return rate is the ratio of the number of questionnaires completed to the number of panel members asked to complete the questionnaire. For the CEE 2009 ENERGY STAR Household Survey, the return rate was 60 percent. While this number is quite high, it must be adjusted by the recruitment rate, which is the number of households that agreed to participate in the Internet/WebTV panel as a proportion of the number of households asked to participate. The recruitment rate was 21 percent. Thus, the response rate for the CEE 2009 ENERGY STAR Household survey was the product of the survey- specific return rate of 60 percent and the recruitment rate of 21 percent. This product is equivalent to the ratio of the number of questionnaires completed to the number of households that were offered the opportunity to be in the study.

## Survey Response Rate

Sendout/requested

1,812

Completed

1,090

Return rate

60%

Recruitment rate

21%

Response rate

13%

A-12