to compare 2 measuring methods A and B, an experiment was carried out. What was done was that both measuring methods were used on 8 test pieces. then the difference between the measured values obtained with method A and method B was formed. These differences were as follows m-_m- investigate with the appropriate hypothesis test at the significance level 0.05 if there is any difference between methods A and B. There is no information about the distribution of the observations so a non-parametric method must be used. a) state the hypotheses b) perform the hypothesis test and answer the question if there is any difference between the methods at the 0.05 significance level