Data on fifth-grade test scores (reading and mathematics) for 434 school districts in California yield Y...

 

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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, 680.42). (Round your responses to two decimal places.) When the districts were divided into districts with small classes (<20 students per teacher) and large classes (≥ 20 students per teacher), the following results were found: Class Size Average Score (V) Standard Deviation (sy) 690.3 20.4 682.5 18.8 Small Large n 235 187 Is there statistically significant evidence that the districts with smaller classes have higher average test scores? The t-statistic for testing the null hypothesis is (Round your response to two decimal places.) 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, 680.42). (Round your responses to two decimal places.) When the districts were divided into districts with small classes (<20 students per teacher) and large classes (≥ 20 students per teacher), the following results were found: Class Size Average Score (V) Standard Deviation (sy) 690.3 20.4 682.5 18.8 Small Large n 235 187 Is there statistically significant evidence that the districts with smaller classes have higher average test scores? The t-statistic for testing the null hypothesis is (Round your response to two decimal places.)

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Okay here are the steps to solve this problem 1 The population mean test score is Y 6... View the full answer