A Sociologist Develops a Test to Measure Attitudes Towards Public $76.2 \pm 0.91$

Multiple Choice

A sociologist develops a test to measure attitudes towards public transportation, and 47 randomly selected subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4.
Construct an approximate 95% confidence interval for the mean score of all such subjects.

A) $76.2 \pm 0.91$
B) $76.2 \pm 6.87$
C) $76.2 \pm 6.24$
D) $76.2 \pm 3.12$