Survey quality for the International Visitor Survey

This page explains what we do to attempt to reduce sampling error in the International Visitor Survey (IVS).

Quality assurance metrics

Below we provide the results against quality assurance metrics that are monitored to reduce sampling error in the International Visitor Survey (IVS). These include:

  • Relative Margin of Error (RME).
  • Sample size.
  • Response rate.

See Survey error for more information about types of errors and how they apply to the IVS.

Relative Margin of Error (RME) for the year to September 2019

The Relative Margin of Error (RME) represents the percentage above and below a figure for which we can be 95% confident that the true value is within.

The International Visitor Survey is designed to have an RME of:

  • 5% for total spend
  • 10% for the top 6 markets — Australia, China, USA, UK, Germany, and Japan.

The target was achieved this quarter, with the RME for total spend at 3.5% for the year ending September 2019, compared with 4.1% for the year ended September 2018.

Table of RMEs

The table below shows the RMEs for the total spend estimate, and for spending by our top 6 visitor markets, along with the upper and lower bounds.

As an example of how to interpret this table, there is 95% confidence that the true value of spending by Australian visitors lies somewhere between $2,511 million and $2,831 million.

 

Year ended September 2018

Year ended September 2019

Country

Total Spend ($m)

RME

Total spend ($m)

RME

Lower bound ($m)

Upper bound ($m)

All

11,063

4.1

11,310

3.5

10,903

11,717

Australia

2,548

4.9

2,671

6.0

2,511

2,831

China

1,630

9.5

1,829

13.8

1,577

2,081

Germany

572

8.4

584

11.6

516

651

Japan

263

18.2

271

10.5

243

299

UK

954

6.9

953

8.7

870

1,036

USA

1,230

10.6

1,415

7.1

1,315

1,515

Sample size for the year to September 2019

The total sample size for the year ended September 2019 was 8,915 down from 9,645 in the year ended September 2018. This is above the target sample size of 8,900 respondents each year.

Country

Year ended September 2018

Year ended September 2019

Target sample size

All

9645

8915

8900

Australia

2124

2029

1347

China

1017

778

1040

Germany

576

542

754

Japan

962

976

752

Uk

985

933

855

USA

1134

1115

920

Response rate for the year to September 2019

The response rate represents the percentage of people who complete the survey as a proportion of the total surveys emailed out. The International Visitor Survey was designed with an expected response rate of 30%.

This table presents the response rates by country for the years ended September 2019 and September 2018. Falling response rates are not necessarily indicative of falling survey coverage, as the achieved sample size may compensate for this.

Country

Year ended September 2018

Year ended September 2019

All

27%

26%

Australia

28%

27%

China

18%

14%

Germany

27%

26%

Japan

39%

37%

UK

28%

26%

USA

28%

26%

 

Last updated: 25 November 2019