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Using MRA in business
The dependent variable
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95 per cent application average basic minutes bureaux cent probability coefficient of determination considered constant CONTROL CHART control limits correlation matrix cost curves data sets degrees of freedom dependent error of estimate example F test F value graph Hewlett Packard increases independent variables joint effect journey key factors large number Leasco Response linear regression measure method miles travelled mini-computer MRA equation MRA exercise multiple correlation coefficient Multiple Regression Analysis normal equations number of independent number of miles number of observations number of variables operator organisation output partial F performance problem production punch tape quantity recorded regression coefficient regression equation regression line relationship relay sales forecast sales turnover screens shown in Figure shows significant simple regression situation squares reduced standard deviation standard error standard minutes statistical step stepwise regression program sum of squares technique time-sharing traffic density TUBE-BENDING FORMER variance variation