Question

5. [Maximum marks: 71 The following table shows the average weights (y kg) for given heights (x cm) in a population of men h Height(x cm) 164 169 173 180 186 Weight, (y kg) 66.5 70.0 73.5 76 78.2 a. The relationship between the variables is modelled by the regression equation y=ax +b. (1) Write down the value of a and of b (ii) Hence, estimate the weight of a man whose height is 172 cm. [4 marks] b. (i) Write down the Pearson correlation co-efficient. [1 mark] (ii) State which two of the following describe the correlation between the variables. [2 marks] Strong, zero, positive, negative, no correlation, weak​

Answer 1

• A pound is an imperial unit of mass or weight. ... A kilogram (kg) is stated to be 2.2 times heavier than a pound (represented as lbs). Thus, one kilo of mass is equal to 2.26lbs.