A Sociologist Develops a Test to Measure Attitudes About Public $17.2 < \sigma < 27.2$

Multiple Choice

A sociologist develops a test to measure attitudes about public transportation, and 27 randomly selected subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4. Construct the 95% confidence interval for the standard deviation, ?, of the scores of all subjects.

A) $17.2 < \sigma < 27.2$
B) $16.9 < \sigma < 29.3$
C) $16.6 < \sigma < 28.6$
D) $17.5 < \sigma < 27.8$