Recent content by Rifscape

You are right that this question is very vague. After some more deliberation, I was able to discover that there should be four equations; one for each constraint. Based on what my professor said, I think the first equation is: y = costs 1. y = 100,000 since this is a fixed value 2. y =...

My apologies. The Equation should be 250,000 = 100,000 + 100,000L + 50,000I Where I = Infrastructure,and L = number of loggers. I do not think that 3rd equation is correct. There should be 4 equations; one for each constraint

I have this word problem, and was wondering how I would go about creating a system of equations. Here is the question: Problem: You are a small forest landowner, and decide you want to sustainably harvest some of timber on your property. There are costs related to the infrastructure needed to...

I see that makes sense. Apologies for the delayed response, was working on the problem. Your solution was very helpful. I was able to solve it thanks to you! The actual solution is not as complicated as the one you gave but your solution definitely put me on the right track. The model for the...

Hi, I was having some trouble doing some bayesian probability problems and was wondering if I could get any help. I think I was able to get the first two but am confused on the last. If someone could please check my work to make sure I am correct and help me on the last question that would be...

Anyone?

Homework Statement Hi, I had a question regarding testing a regression models coefficients. Say there is a regression model that has the form: y = b0 + b1x1 + b2x2 + b3x3 + b4x4 + e For the sake of simplicity let: e be the random error, x1 is age, x2 is severity, and x3 is anxiety. y is...

Alright cool that makes sense, one quick question though. After consulting the textbook, it seems that when you calculate sample size you always use the z score value even when you have to use s instead of sigma, is there a reason for this? When I used the z score value in the sample size...

Ray you save me every time haha. Yeah I understand how to use the formulas to answer it. So based on the information you gave me, I would only use the Z critical value for the question which states that you know the population standard deviation. However for all other parts I would use the T...

Homework Statement Hi, Alright so I have some confusion on when to use specific tests and the z vs t test. Given this example (not my homework) could someone please clarify. Alright say you have a random sample of size 200. You find the sample mean to be 10 and the sample standard deviation...

Homework Statement Hi, I have this question that I've been pondering for a while, I keep flipflopping on what I think is right. I only need help on the last part on whether the events are independent or not, the rest of the text is backstory to the question. I know for events to be independent...

Homework Statement An article in Business Week reports profits and losses of firms by industry. A random sample of 100 firms is selected, and for each firm in the sample, we record whether the company made money or lost money, and whether or not the firm is a service company. The data are...

Would I need to split it up and integrate x from -inf to 0, and then integrate x from 0 to inf?

You're right, it was 49/8 not 8/49 for the constant. I tried drawing the picture, I got that the bounds seem to look like its from -inf to inf. But for the distribution wouldn't I have to get x in terms of y? That's why I thought the bounds would be from -x to x, since x < y and y > -x.

Homework Statement f(xy)=49/8*e^(−3.5*y) 0 < y < inf and −y < x < y 0 otherwise a. Find the marginal probability density function of X, fX(x). Enter a formula in the first box, and a number for the second and the third box corresponding to the range of x. Use * for multiplication, / for...