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What are the main factors when deciding whether or not the Poisson distribution is a suitable model?

The events must occur: randomly; singly in space or time; independely of each other and at a constant rate
RA
Answered by Rizwana A. • Maths tutor
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Explain how Differentiation by the chain rule works

If the expression to be differentiated is a (differentiable) function of another (differentiable) function, then the chain rule must be applied. For example y= f(g(x)), where f and g are both differentiable,...
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Answered by Gwyndaf O. • Maths tutor
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can you show me how to solve simultaneous equations?

(Depending on what the pupil wants to get out of this session and their ability I will explain the background of simultaneous equations and draw a graph of two lines and sho that their intersection is the po...
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Answered by Ryan A. • Maths tutor
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Solve the simultaneous equations, 3x + 2y = 4 (1) 4x + 5y = 17 (2)

Solving simultaneous equations by elimination; firstly you would multiply the first equation by 4 to get another equation which we will name (3), and multiply the second equation by 3 to get another equation...
AP
Answered by Akash P. • Maths tutor
5345 Views

Solve the quadratic equation: x^2 - 2x - 15 = 0

We need to find numbers that multiply together to give -15. This could be -1 and 15, 1 and -15, -3 and 5, 3 and -5. The numbers we need must add up to -2 as well (from -2x term). Therefore our set must be 3 ...
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Answered by Sabrina K. • Maths tutor
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