: In an article in the Journal of Advertising, Weinberger and Sports compare the use of humour in te

: In an article in the Journal of Advertising, Weinberger and Sports compare the use of humour in television ads in the United States and in the United Kingdom. Suppose that independent random samples of television ads are taken in the two countries. A random sample of 400 television ads in the United Kingdom reveals that 142 use humour, while a random sample of 500 television ads in the United States reveals that 122 use humour.

Decide at the level of significance of 1% whether the proportion of ads using humour in the United Kingdom differs from the proportion of ads using humour in the United States.

Decide at the level of significance of 0.5% whether the proportion of ads using humour in the United Kingdom is significantly greater than or equal to the proportion of ads using humour in the United States.

 

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