A researcher records the number of classroom interruptions during each of two class sessions.Which session has the largest standard deviation?
Session A: 12,15,18,24,and 30
Session B: 8,10,12,16,and 20
A) Sample A
B) Sample B
C) Both samples have the same standard deviation.

Question

Quizplus · Accepted Answer

To find the standard deviation, we can use the formula: 
Standard deviation = square root of [(Sum of (x - mean)^2) / (n - 1)]
For Session A, the mean is 19.8 and the standard deviation is 7.3
For Session B, the mean is 13.2 and the standard deviation is 4.5
Therefore, Sample A has a larger standard deviation.

A Researcher Records the Number of Classroom Interruptions During Each