How to calculate Confidence Intervals and Margin of Error
Many more interesting items over the next few weeks. Members of the Philatelic Traders Society (PTS). 1840 2d pale blue plate 2 ee 4m very fine used large margins cat. £1200.00 a very fine used 2d pale blue from plate 2 lettered ee full description below. This item can be shipped worldwide.
Many more interesting items over the next few weeks. Members of the Philatelic Traders Society (PTS). 1840 2d pale blue plate 2 ee 4m very fine used large margins cat. £1200.00 a very fine used 2d pale blue from plate 2 lettered ee full description below. This item can be shipped worldwide.