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 December 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 3.6% for the year ending December 2019, compared with 3.8% for the year ended December 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 $2,571 million and $2,908 million.

 

Year ended December 2018

Year ended December 2019

Country

Total Spend ($m)

RME

Total spend ($m)

RME

Lower bound ($m)

Upper bound ($m)

All

11,181

3.8

11,468

3.6

11,058

11,878

Australia

2,578

5.0

2,739

6.2

2,571

2,908

China

1,687

10.6

1,730

14.5

1,479

1,981

Germany

581

7.8

573

11.8

505

640

Japan

247

11.3

277

9.9

249

304

UK

906

7.4

1,038

10.3

931

1,145

USA

1,184

7.9

1,528

8.1

1,405

1,652

Sample size for the year to December 2019

The total sample size for the year ended December 2019 was 8,708 down from 9,338 in the year ended December 2018. This is against the target sample size of 8,900 respondents each year.

Country

Year ended December 2018

Year ended December 2019

Target sample size

All

9338

8708

8900

Australia

2287

1976

1347

China

1037

698

1040

Germany

574

546

754

Japan

667

1011

752

UK

1019

876

855

USA

777

1088

920

Response rate for the year to December 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: 02 March 2020