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Data on fifth-grade test scores (reading and mathematics) for 434 school districts in California yield Y= 678.5 and standard deviation sY=20.5. The 95% confidence interval

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Data on fifth-grade test scores (reading and mathematics) for 434 school districts in California yield Y= 678.5 and standard deviation sY=20.5. The 95% confidence interval for the mean test score in the population is (676.58, ). (Round your responses to two decimal places.) When the districts were divided into districts with small classes (

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