Question 1 of 30
A company is analyzing the quality of its VoIP calls to improve customer satisfaction. They have collected data over a month and calculated the Mean Opinion Score (MOS) for their calls. The MOS values are as follows: 4.2, 3.8, 4.5, 4.0, 3.9, 4.1, 4.3, 4.0, 3.7, and 4.4. The company wants to determine the standard deviation of these scores to understand the variability in call quality. What is the standard deviation of the MOS scores?
0.23
0.35
0.45
0.3

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