Estimate the Mean of Grouped Data

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Estimate the Mean of Grouped Data
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Estimated Mean Higher Tier 2005
The table shows the hours of computer use by a
group of students. Workout an estimate of the mean
3
Estimated Mean Higher Tier 2005
The table shows the hours of computer use by a
group of students. Workout an estimate of the mean
4
Estimated Mean Higher Tier 2005
The table shows the hours of computer use by a
group of students. Workout an estimate of the mean
5
Estimated Mean Higher Tier 2005
The table shows the hours of computer use by a
group of students. Workout an estimate of the mean
Estimated Mean ? 730 36 20.28