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A one tailed test is when you are testing specifically for an increase or decrease- eg whether the probability of a person buying a product has INCREASED after a marketing change

A two tailed test ...

Firstly you would have to differentiate the equation to find the expression that describes the rate of change of the parameters relative to each other using the standard differentiation method. This invol...

If you have a fraction divided by another fractions things can get tricky, but there is an easy way to avoid getting triple decker fractions! Have a look at this example: (1/2) / (2/5) = (1/2) x (5/2) = (...

first of all it is best to get rid of the brackets. You do this by times each component in the bracet by the number on the outside in this case it is 2.

7x + 8 = 12x - 4

then you want to get...

In order to solve this question we simply must substitute x=1 into f(x). But what is f(x)? What does it actually mean to make a subsitution? f(x) has a fancy name attached to it called a funct...