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Date of survey

:

5 to 12 March, 2013
 

Survey method

:

Telephone survey conducted by telephone interviewers
 

Target population

:

Hong Kong citizens aged 18 or above who speak Cantonese
 

Sampling method

:

Telephone numbers were selected randomly from residential telephone directories and mixed with additional numbers generated by the computer. If more than one eligible subject had been available, the one who had his/her birthday next was selected.
 

Sample size

:

1,009 successful cases
 

Response rate

:

68.4%
 

Std. sampling error

:

At 95% confidence level, the maximum sampling error of all percentages should be no more than +/-3.1 percentage points