Do Americans trust advertisements? The following table summarizes the results of a YouGov. com survey that asked ­Americans who see advertisements at least once a month how honest advertisements are.

a. At the 0.05 level of significance, is there evidence of a difference in the proportion of Americans who say advertisements are honest on the basis of geographic region? YouGov. com also asked Americans who see advertisements at least once a month whether they trust the advertisements that they see, read, and hear. The following table summarizes the results of this second survey.

b. At the 0.05 level of significance is there evidence of a difference in the proportion of Americans who say they trust advertisements on the basis of geographic region?

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GEOGRAPHIC REGION HONEST? Northeast Midwest South Wst otal Yes No Total 102 74 176 18 220 115 130 245 135 211 355 432 987 93 GEOGRAPHIC REGION TRUST? Northeast Midwesuh West Total Yes No Tidal 108 202 93 152 245 491 쁘쁘 쁘 987 103153 176 211 355