A survey revealed that 128 people out of 400 interviewed in a city where the product...

A survey revealed that 128 people out of 400 interviewed in a city where the product was widely advertised used a household product, but 115 out of 390 used it in a city where there was no advertising. Determine whether or not advertising is effective at the .05 level.

Expert Solution

(2) Rejection Region

(5) Conclusion

It is concluded that the null hypothesis Ho is not rejected. at the .05 level.Therefore, there is not enough evidence to claim that advertising is effective

orchestra answered 2 years ago

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