A study of the use of social media asked a sample of 488 American adults under the age of 40 and a sample of 421 American adults aged 40 or over about their use of social media. The two-samplestatistic for the social media use study (under 40 mean minus 40 and over mean) is. TheP-value for testing the hypotheses from the previous exercise satisfies

0.001 <P< 0.002.0.001 <P< 0.005.

0.0005 <P< 0.001.