A school district official intends to use the mean of a random sample of 125 sixth graders to estimate the mean score that all sixth graders in the district would get it they took a comprehensive science test to prepare them for seventh grade. An official knows that o = 8.3 based on the data of students' science test scores since the early 1990's. In one sample, the 60.5. Construct a average scored by a sixth grader in the comprehensive science test is x 95% confidence interval for the average score that all sixth graders in the district if they took the %3D comprehensive science test. Select one:

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A school district official intends to use the mean of a random sample of 125 sixth graders to
estimate the mean score that all sixth graders in the district would get it they took a
comprehensive science test to prepare them for seventh grade. An official knows that o = 8.3
based on the data of students' science test scores since the early 1990's. In one sample, the
average scored by a sixth grader in the comprehensive science test is x = 60.5. Construct a
95% confidence interval for the average score that all sixth graders in the district if they took the
comprehensive science test.
Select one:
O a. Lower Limit = 63.6; Upper Limit = 80.9
%3D
Ob. Lower Limit = 40.3; Upper Limit = 45.5
%3D
C c. Lower Limit 52.2; Upper Limit = 68.8
%3D
O d. Lower Limit = 59.0; Upper Limit = 62.0
Transcribed Image Text:A school district official intends to use the mean of a random sample of 125 sixth graders to estimate the mean score that all sixth graders in the district would get it they took a comprehensive science test to prepare them for seventh grade. An official knows that o = 8.3 based on the data of students' science test scores since the early 1990's. In one sample, the average scored by a sixth grader in the comprehensive science test is x = 60.5. Construct a 95% confidence interval for the average score that all sixth graders in the district if they took the comprehensive science test. Select one: O a. Lower Limit = 63.6; Upper Limit = 80.9 %3D Ob. Lower Limit = 40.3; Upper Limit = 45.5 %3D C c. Lower Limit 52.2; Upper Limit = 68.8 %3D O d. Lower Limit = 59.0; Upper Limit = 62.0
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