Reader's Digest (Canada) - - Health -

In an in­de­pen­dent opinion poll, com­mis­sioned by Reader's Di­gest, Ip­sos Canada con­ducted an on­line sur­vey of over 4,000 Cana­dian adults from Sept 9-16, 2016. Quota sam­pling was used and the sam­ple was strat­i­fied by lan­guage (English n = 3,053 and French n = 956.) Re­spon­dents were asked for their most trusted brand within each cat­e­gory, in an open-ended ques­tion for­mat. Re­sults were weighted to cen­sus data to be rep­re­sen­ta­tive of the pop­u­la­tion. Us­ing a cred­i­bil­ity in­ter­val, the over­all re­sults are con­sid­ered ac­cu­rate to within +/-1.8 percentage points, 19 times out of 20, of what the re­sults would be had the en­tire pop­u­la­tion of adults been polled.

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