EM-1271
Measures of spread
E Math · Secondary 3 · Medium · Measures of spread
In a survey, the daily screen time (in hours) of 50 teenagers has mean 4.2 hours and standard deviation 1.1 hours. Each value is increased by 0.5 hours to correct an error. What is the new standard deviation?
- 0.6 hours
- 1.1 hours
- 1.6 hours
- 4.7 hours
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