Answer Happy

Dats on fifth-grade test scores (reading and mathematics) for 439 school districts in Califomia yield V=620.4 and standard deviation by 18.7. The 95% confidence interval for the mean test score in t population in ((Round your responses to two decimal places) When the districts were divided into districts with small classes (20 students per teacher) and large classes (220 students per teacher), the following results were found Standard Deviation (ay) Class Size Small Large Average Score (V) 631.1 624.0 18.0 17.2 Is there statistically significant evidence that the districts with smaller classes have higher average test scores? The 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 Nom Dist to help anewer this question The p-value for the test is is there statistically significant evidence that the districts with smaller dasses have higher average test score? The small p-value suggests that the nut hypothesis can be rejected with a high degree of confidence. Hence, there is n 229 185