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A sociologist develops a test to measure attitudes about public transportation, and 27 randomly subjects are...

A sociologist develops a test to measure attitudes about public transportation, and 27 randomly subjects are given the test. Their average score is 76.2 and their standard deviation is 21.4. Construct the 95% confidence interval for the mean score of all such subjects. Also find the margin of error. Round your answers to 3 decimal places.

a. (66.745,85.655), margin of error=9.455

b. (69.176,83.224), margin of error=7.024

c. (0.178,0.377), margin of error=0.101

d. (67.734,84.666), margin of error=8.466

e. (0.248,0.463), margin of error=0.108

Math   Statistics-And-Probability   
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Answer #1

Answer : Option ( d )       (67.734,84.666), margin of error=8.466

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