A test of writing ability is given to a random sample of 11 students before and after they completed a formal writing course. The results are given below: Before: Mean=80.27, st dev=12.76 After: Mean=78.27, st dev=12.92 Before-After: Mean=2, st dev=2.65 Construct a 99% confidence interval for the mean difference between the before and after scores. Round your answer to 3 decimal places. Group of answer choices (-2.153,1.847) (-0.532,4.532) (1.847,2.153) (13.579,17.579) (-13.579,17.579)
A test of writing ability is given to a random sample of 11 students before and after they completed a formal writing course. The results are given below: Before: Mean=80.27, st dev=12.76 After: Mean=78.27, st dev=12.92 Before-After: Mean=2, st dev=2.65 Construct a 99% confidence interval for the mean difference between the before and after scores. Round your answer to 3 decimal places. Group of answer choices (-2.153,1.847) (-0.532,4.532) (1.847,2.153) (13.579,17.579) (-13.579,17.579)
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 58E: What is meant by the sample space of an experiment?
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A test of writing ability is given to a random sample of 11 students before and after they completed a formal writing course. The results are given below:
Before:
After: Mean=78.27, st dev=12.92
Before-After: Mean=2, st dev=2.65
Construct a 99% confidence interval for the mean difference
between the before and after scores. Round your answer to 3 decimal places.
Group of answer choices
(-2.153,1.847)
(-0.532,4.532)
(1.847,2.153)
(13.579,17.579)
(-13.579,17.579)
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