Use the One-Standard-Deviation Chi-Square Interval Procedure to Obtain the Specified

Multiple Choice

Use the one-standard-deviation chi-square interval procedure to obtain the specified confidence interval for thepopulation standard deviation Ϭ. Assume that the population has a normal distribution.
-A sociologist develops a test to assess 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 a 95% confidence interval for the standard deviation, Ϭ, of the scores of all subjects.

A) 17.5 to 27.8
B) 16.9 to 29.3
C) 16.6 to 28.6
D) 17.2 to 27.2