FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A random sample of 85 second-graders in a large city take a course designed to improve reading speed, in seconds per page. Based on this sample, a 90% confidence interval for the mean improvement in reading speed for all sixth-graders in the city taking this course is found to be (12.6, 14.8). Which of the following are the point estimate and margin of error for this interval is based?
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Point estimate = x-bar = 13.7 sec/pg ; Margin of Error = 1.1sec/pg
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Point estimate = mu = 13.7 sec/pg ; Margin of Error = 1.1 sec/pg
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Point estimate = x-bar = 13.1 sec/pg ; Margin of Error = 2.2 sec/pg
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Point estimate = mu = 13.1 sec/pg ; Margin of Error = 1.1 sec/pg
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Explanation:
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