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a researcher is interested in determining whether a sample of students at a university have a different GPA than the entire population of students. The

a researcher is interested in determining whether a sample of students at a university have a different GPA than the entire population of students. The sample's average GPA is 3.45 with a SD of .25 and there are 25 students in the sample. The population has an average GPA of 3.80. The value of t-obt is ______________. round your answer to four decimal places

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