







The test for some disease is 99% accurate 
20100224 

From baaba: Assume that the test for some disease is 99% accurate. If somebody tests positive for that disease, is there a 99% chance that they have the disease? Answered by Chris Fisher. 





Accuracy of Data 
20090625 

From Bill: If say, a predictin is 20 and the actual is 35 how do you work out the accuracy of the prediction Answered by Janice Cotcher. 





How accurate is the following calculation? 
20080903 

From Craig: Given that these numbers are only accurate to 2 decimal places, how accurate is the following calculation?
1.73  2.16 + 0.08 + 1.00  2.23  0.97 + 3.02 = 0.47
How do I work out the accuracy? Answered by Penny Nom. 





Calculations 
20021215 

From Mahdi: This problem is rather general, but it usually makes a lot of problems. I almost have no difficulty in math and physics questions, but unfortunately I'm not at all accurate in simple one or two digit calculation. I even sometimes make silly mistakes in simple sums like 7+4=12 or 4+5=11! Is there any effective way to reduce these mistakes? Answered by Walter Whiteley. 

