A research team recorded the daily number of unique visitors to a new website over five consecutive days. The figures were: 240, 310, 280, 270, and 300.
What was the mean daily number of unique visitors for this five-day period?
A: 280
B: 1400
C: 290
D: 270
Answer:A
The mean is calculated by summing all the values and then dividing by the number of values.
Sum of visitors = 240 + 310 + 280 + 270 + 300 = 1400
Number of days = 5
Mean = Sum / Number of days = 1400 / 5 = 280
Why others are wrong:
A — Correct.
B — This is the sum of the daily visitors, not the mean.
C — This value could result from an error in summing the numbers or by incorrectly excluding one data point before averaging.
D — This is one of the daily visitor figures and does not represent the mean of the entire set.
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