The Wicomico County Board of Education is in the process of developing a new exam to...
The Wicomico County Board of Education is in the process of
developing a new
exam to evaluate the reading level of all fourth-graders in the
county. To pilot the
exam, it was administered to a random sample of 20 fourth-graders.
This sample of
students had a mean exam score of 72.3 and a standard deviation of
9.7 points.
a) Assuming that the population of exam scores is normally
distributed, construct
and interpret a 98% confidence interval to estimate the mean exam
score for the
population of Wicomico County fourth-graders.
b)Does this sample of exam scores provide sufficient evidence
for the county to
conclude that the mean exam score for the population of county
fourth-graders
exceeds 70 points?
c) Is it plausible that the mean exam score for the population
of county fourth-
graders equals 70 points?
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The Wicomico County Board of Education is in the process of
developing a new
exam to...
The State Board of Education in Georgia is considering introducing a new initiative to boost the...
The State Board of Education in Georgia is considering introducing a new initiative to boost the reading levels of fourth graders. The current population mean reading level of a fourth grader is 800 points. To assess the impact of the initiative, the developers were given permission to pilot their ideas in the classrooms of several area elementary schools. At the end of the pilot, a sample of 1000 fourth graders produced an average reading level of 856 points with a...
The State Board of Education in Georgia is considering introducing a new initiative to boost the...
The State Board of Education in Georgia is considering introducing a new initiative to boost the reading levels of fourth graders. The current population mean reading level of a fourth grader is 800 points. To assess the impact of the initiative, the developers were given permission to pilot their ideas in the classrooms of several area elementary schools. At the end of the pilot, a sample of 1000 fourth graders produced an average reading level of 856 points with a...
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The State Board of Education in Georgia is considering introducing a new initiative to boost the reading levels of fourth graders. The current population mean reading level of a fourth grader is 800 points. To assess the impact of the initiative, the developers were given permission to pilot their ideas in the classrooms of several area elementary schools. At the end of the pilot, a sample of 1000 fourth graders produced an average reading level of 856 points with a...
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