In August 2003, 56% of employed adults in the United States reported that basic mathematical skills were critical or very important to their job. The supervisor of the job placement of?ce at a 4-year college thinks this percentage has increased due to increased use of technology in the workplace.,He takes a random sample of 480 employed adults and ?nds that 297 of them feel that basic mathematical skills are critical or very important to their job. Is there suf?cient evidence to conclude that the percentage of employed adults who feel basic mathematical,skills are critical or very important to their job has increased at the ? = 0.05 level of signi?cance?

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