The following table shows the front tyre pressure, in psi, of five 4 wheeled vehicles, A to E a Show that the variance of the pressure in all of these front tyres is 7 65psi 2 b Rear tyre pressures for these five vehicles are denoted by x Given that x 2 7946 and that the variance of the pressures i...

The following table shows the front tyre pressure, in psi, of five 4-wheeled vehicles, A to E.

Question:

The following table shows the front tyre pressure, in psi, of five 4-wheeled vehicles, A to E.

a. Show that the variance of the pressure in all of these front tyres is 7.65psi².

b. Rear tyre pressures for these five vehicles are denoted by x. Given that Σx² = 7946 and that the variance of the pressures in all of the front and rear tyres on these five vehicles together is 31.6275psi2, find the mean pressure in all the rear tyres.

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