Final answer:
The standard deviation can be calculated using the formula: standard deviation = standard error * sqrt(n), where n is the number of subjects.
Step-by-step explanation:
To calculate the standard deviation from the standard error, you can use the formula: standard deviation = standard error * sqrt(n), where n is the number of subjects. In this case, the standard error is given as 2 and the number of subjects is 16. Therefore, the standard deviation can be calculated as follows:
standard deviation = 2 * sqrt(16) = 2 * 4 = 8
So, the standard deviation is 8, which means option c. 8 is the correct answer.