Internet Service Provider 2015

The Internet service provider survey is a postal survey of all businesses that meet the population selection criteria. Population size The Internet Service Provider (ISP) Survey is a survey sent to all New Zealand-based Internet service providers. The target population for the ISP Survey in 2015 was 89 businesses. This increased from 2014, when 84 businesses were surveyed. Such changes in the population can be explained by: new businesses being created existing businesses merging or ceasing improved selection method. Not all businesses identified in the survey population ultimately report ISP activity. Response rates The overall target response rate for ISP 2015 was 85 percent which was achieved. Some businesses were identified as key units if their total number of connections made significant contributions to the previous ISP survey. The target response rate for key businesses was 100 percent, and this target was achieved. Non-Response The ISP Survey is a census; therefore the data is not subject to sample error. Unit non-response occurs when a business does not return the questionnaire. While weighting is commonly used in other Statistics NZ surveys, it is not applied to the ISP Survey. This is because there are no external (non-survey) variables that allow us to group businesses in a way that they are likely to provide similar survey responses, and therefore be representative of one another. To minimise the impact of unit non-response on the outputs, key respondents are targeted with 100 percent response rate targets. Therefore, we do not expect overall figures to be significantly affected by unit non-response. Data for businesses that did not respond to the survey was not imputed. Item non-response is not applied to the ISP survey either, for the same reasons as above. en-NZ