Some years ago a survey concluded that 60% of Americans considered themselves more intelligent than average. A group of researchers

Some years ago a survey concluded that 60% of Americans considered themselves more intelligent than average. A group of researchers decided to conduct another survey to see whether this figure had changed. Of the 1,500 people who were surveyed, 975 considered themselves smarter than average.

At a 0.01 level of significance, does this result suggest that the original figure of 60% has changed?


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