Mathematics, 13.12.2019 04:31 jamayeah02
Apsychologist conducted a survey of the attitude towards the sustainability of american energy consumption with 260 randomly selected individuals several years ago. the psychologist believes that these attitudes have changed over time. to test this he randomly selects 260 individuals and asks them the same questions. can the psychologist confirm his theory that the attitudes have changed from the first survey to the second survey
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