Data on fifth-grade test scores (reading and mathematics) for 421 school districts in California yield Y = 620.4 and standard deviation sy = 18.7. 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 (2 20 students per teacher), the following results were found: Class Size Average Score (Y) Standard Deviation (Sy) Small 631.1 18.6 231 Large 624.0 17.2 185 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.) The p-value for the test is. (Round your response to six decimal places.) Hint: Use the Excel function Norm.S.Dist to help answer this question. Is there statistically significant evidence that the districts with smaller classes have higher average test scores? suggests that the null hypothesis the districts with smaller classes have higher average test scores. The V with a high degree of confidence. Hence, statistically significant evidence that

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Data on fifth-grade test scores (reading and mathematics) for 421 school districts in California yield Y = 620.4 and standard deviation sy = 18.7.
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 (2 20 students per teacher), the following results were
found:
Class Size
Average Score (Y)
Standard Deviation (sy)
Small
631.1
18.6
231
Large
624.0
17.2
185
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.)
The p-value for the test is . (Round your response to six decimal places.) Hint: Use the Excel function Norm.S.Dist to help answer this question.
Is there statistically significant evidence that the districts with smaller classes have higher average test scores?
The
suggests that the null hypothesis
V with a high degree of confidence. Hence,
statistically significant evidence that
the districts with smaller classes have higher average test scores.
Transcribed Image Text:Data on fifth-grade test scores (reading and mathematics) for 421 school districts in California yield Y = 620.4 and standard deviation sy = 18.7. 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 (2 20 students per teacher), the following results were found: Class Size Average Score (Y) Standard Deviation (sy) Small 631.1 18.6 231 Large 624.0 17.2 185 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.) The p-value for the test is . (Round your response to six decimal places.) Hint: Use the Excel function Norm.S.Dist to help answer this question. Is there statistically significant evidence that the districts with smaller classes have higher average test scores? The suggests that the null hypothesis V with a high degree of confidence. Hence, statistically significant evidence that the districts with smaller classes have higher average test scores.
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