7. Data on fifth-grade test scores (reading and mathematics) for 417 school districts in California yield Y = 652.7 and

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7 Data On Fifth Grade Test Scores Reading And Mathematics For 417 School Districts In California Yield Y 652 7 And 1 (463.21 KiB) Viewed 15 times

7. Data on fifth-grade test scores (reading and mathematics) for 417 school districts in California yield Y = 652.7 and standard deviation sy = 19.7. The 95% confidence interval for the mean test score in the population is ( ). (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: Average Score (Y) Standard Deviation (sy) 664.0 656.5 19.6 18.1 Class Size Small Large The p-value for the test is Is there statistically significant evidence that the districts with smaller classes have higher average test scores? large p-value (2) small p-value 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.) (Round your response to six decimal places.) Hint: Use the Excel function Norm.S.Dist to help answer this question. The (1) suggests that the null hypothesis (2) districts with smaller classes have higher average test scores. can be rejected cannot be rejected there is there is no n with a high degree of confidence. Hence, (3) 235 179 statistically significant evidence that the