What do you need to use while estimating the mean from a grouped frequency table?, The mid point, The upper limit, Just add and divide, It’s the middle one, Highest take lowest, Where do you plot the horizontal coordinate on a cumulative frequency curve?, The mid point, The lowest point, The upper limit, The mean age of 10 students is 11, a 22 year old teacher joins them the new mean is?, 16, 18, 12

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