Recent content by Doffy

Ok, I understand now. Thanks for helping.

Hello (Smile). I have been stuck on this question for a while. A company charges $550 for a transistor set on orders of 50 or less sets. The charge is reduced by $5 per set for each order in excess of 50 sets. Find the largest size order company should allow so as to receive a maximum revenue...

Yes it is correct. In this case, the conditional probability can be equated as: $$\frac{P(winning-at-home)}{P(winning)}$$.

You could multiply the probability of atleast 3 successive calls twice i.e P($$\ge$$ 3 phone calls) x P($$\ge$$ 3 phone calls), since our event gets completed only if we consider both of it's elements(in this case, the number of calls in two successive minutes). This is just my suggestion as I...

Well, I am afraid that no further information of any kind is available. However, I was wondering that since regression coefficient is the geometric mean of the regression coefficients, can we use this fact to determine our equation? Also that, the range of r is -1$$\le$$ r $$\le$$ +1. Is it...

How do I determine the regression equation when not much information is given? For example: Given the following equations: 2x + y = 13 2x + 5y = 20, which one is the regression equation of y on x?

Thanks for the welcome!:) And the above two equations were obtained for deriving the regression line of y on x(it said so in the question). In my opinion, by solving the above equations, the point I would get could become (x bar, y bar). But I cannot find the regression coefficient. What do...

Two normal equations are given : 5a + 10b = 40 10a + 25b = 95 What is the regression line of y on x? I can easily find the common points from both the equations but how do I find the regression coefficeint?

That still leaves too many options. Could you please be a little more specific?

What steps can be taken to solve an equation with a relatively higher power on one side such as: 6977x/1200 = (1 + x/12)60 - 1

According to this, we find that a1=d=1/pq. However, I am still confused about the sum of pqth term.

The pth term of an airthmetic progression is 1/q and qth term is 1/p. What is the sum of pqth term?