If the sum of the product of deviations of x and y series from
their means is zero, then the
coefficient of correlation will be

Find the equation of the line with slope =8 and passing through (6,53) write your equation in the form y=mx+b

State one method by which you can recognize a perfect square trinomial.

Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain