a) Get the best linear relationship in accordance with least square analysis for the following data:-

X 0.9 2.3 3.3 4.5 5.7 6.7

Y 1.1 1.6 2.6 3.2 4.0 5.0

b) The table below shows the frequency distribution of resistance of resistor manufactured by a company

Rresistance(Ω)                                      Company
        93-95                                                 4
        96-98                                                15
        99-101                                               33
       102-104                                               21
       105-107                                               07

Calculate arithmetic mean, mode, median and use this value in best estimate of true value of data and compare the result.