# Recent content by bhoover05

1. ### Finding Initial Velocity from Rate, Distance, and Time

Hi guys! We started integral word problems today. I am very confused and could use some help with the following; A particle is moving along a straight line accelerating at a constant rate of 5 m/s^2. Find the initial velocity if the particle moves 60m in the first 4 seconds. Now, I...
2. ### 95% Confidence Intervals

Ok. . . Now to expand from CI's to hypothesis testing. . . I understand that for small n, and data approx. Normal, you use the formula T= (x-bar - mu initial)/(s/ sqr n) Now, what If i have no mu initial given. . . Example- Sample mean= 0.8 St. D= 0.1789 n=6
3. ### 95% Confidence Intervals

Oh that is so easy! I way over thought that. . . Thanks guys
4. ### 95% Confidence Intervals

I was under the impression that 95% C.I requires that the critical value in the error term comes from a t-distribution with 25 degrees of freedom. I was taught in class today that a 25% CI requires that the critical value in the error term comes from a t-distribution with 23 degrees of...
5. ### What is the probability

I have ran thru a couple of other problems that are a lot easier to see if I have improved at all. . . Thought maybe you would enjoy checking over them :-)? 1. A game of Yahtzee, you get 3 rolls of the dice per turn, and you get to choose which ones you re-roll each time. My brother calls me...
6. ### What is the probability

^ and the n would still be 125 since there are 125 students. . .
7. ### What is the probability

Here I was, thinking I was on a roll. . . Ugh. Well, would this involve using the same formula? The: (n/x)p^x(1-p)^n-x the p would still equal 0.05 since its 5%?
8. ### What is the probability

Yes, I see how that works. I can NOT believe I was so easily confused by some basic algebra! AH! I feel quite ridiculous having stumbled through that the way I had. Thank you so much for your support!
9. ### What is the probability

For the question about the friends coming down to attend a football game, I do believe I have to use the equation. . . (n/x)p^x(1-p)^n-x Here, I think, you would use 125 for n (since there are 125 students asked), 4 for x (since there is a total of four tickets needed), and the p would be...
10. ### What is the probability

AH! :-)! (drum roll. . . ) 0 = (-5)(12) + (W)(1) … 60= 1W W= 60 EVEN :-) ! (right*crosses fingers*- third time is a charm???)
11. ### What is the probability

0 = E(x)= (-5)(12/13)+(W)(1/13), so, W = 13W? Meaning -4.6153 should be divided by 13W? And no! I am really trying to learn this. . . I greatly appreciate your help! I am a psychology major with an emphasis with behavior analysis- I never work with stats on my day to day life! But I...

14. ### What is the probability

I do believe that I have an idea as to how to do number 5. E(x)= (amount lossed)(prob. of loss)+(amount gained)(prob. of a win) where x= expected value of the profited?
15. ### What is the probability

ooooh! thank you for your help!