Data. A researcher is interested in the effects of practice on the accuracy of signal-detection task. Seven participants were tested in three conditions: after no practice, after 1-hour practice and after 3 hours of practice. Each person participated in all three conditions. The following data indicate how many signals were accurately detected at each level. Test the claim that practice improves detection at p = 0.01. Grand Mean,to obtain SSsubjects must be calculated to 4 decimals. No Practice 1 Hour 3 Hour 3 4 7 4 4 5 2 3 4 1 3 6 3 6 7 3 4 6 2 3 5 Mean=2.57 Mean=3.86 Mean=5.71 SSBetween or factor (from ANOVA ) round to for decimals = sswithin or error = SSError- SSsubjects