fllustration 12.11. Given below are the figures of production in thousand quintals of a sugar factory. Year 1964 1965 1966 1967 1968 1969 1970 Production 77 88 94 85 91 98 90 (i) Fit a straight line trend by the 'least square' method. Tabulate the trend values. (ii) What is the monthly increase in production?

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