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Table 1 Sample size and sampling result

From: Customer satisfaction of Vietnam Airline domestic service quality

Route

Quota

Interviewed passengers

Qualified responses

TPHCM (SGN)-HaNoi (HAN)

160

200

163

TPHCM (SGN)-NhaTrang (NHA)

120

150

122

TPHCM (SGN)-DaNang (DAN)

120

150

117

Total

400

500

402