I was very saddened to see Nick Eardley trying to present some data graphically on BBC TV News very recently. He was trying to make an argument about austerity, and expenditure - for example on the NHS, and whether it would be better or worse under Labour - or any other party.
Unfortunately the graph as presented showed nothing of the sort. What he was trying to show was an extrapolation from data dating back to the start of the 2000s, but unfortunately the line marked as a prediction went upwards, yet without any evidence that it should do that. It would have been perfectly reasonable to have had a straight line, or even a downward curving prediction. What he should have shown - based on the data - should have looked more like a hosepipe spraying out water, with some lines going up, some carrying on roughtly in a straight line, and some curving down.
Thus there should have been several possible trajectories, with no particular strength attached to any of them - and probably not the one actually shown as "the" prediction.
There may have been other factors or reasons for the justifications given, but based on the data as presented visually the extrapolation was not at all valid.
To me this is/was very shoddy reporting. The BBC should do better than this.
Unfortunately the graph as presented showed nothing of the sort. What he was trying to show was an extrapolation from data dating back to the start of the 2000s, but unfortunately the line marked as a prediction went upwards, yet without any evidence that it should do that. It would have been perfectly reasonable to have had a straight line, or even a downward curving prediction. What he should have shown - based on the data - should have looked more like a hosepipe spraying out water, with some lines going up, some carrying on roughtly in a straight line, and some curving down.
Thus there should have been several possible trajectories, with no particular strength attached to any of them - and probably not the one actually shown as "the" prediction.
There may have been other factors or reasons for the justifications given, but based on the data as presented visually the extrapolation was not at all valid.
To me this is/was very shoddy reporting. The BBC should do better than this.
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