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...
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
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...
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...
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%?
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!
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...
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...
So for a fair game, E(x)=0
E(x)= (amount lossed)(prob. of loss)+(amount gained)(prob. of a win)
where x= expected value of the profited
Alright. . .
~amount lost= $5, SO -5
~prob. of loss= (number of cards that are not aces/full deck)= (48/52) OR (12/13)
~amount gained (Win)= x(win)...
E(x)= (amount lossed)(prob. of loss)+(amount gained)(prob. of a win)
where x= expected value of the profited
Alright. . .
~amount lost= $5
~prob. of loss= (number of cards that are not aces/full deck)= 48/52
~amount gained is what we are trying to figure out so we can determine the...
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?