A die has 2 red faces, 2 blue faces, and 2 green faces. It is rolled 240 times. Let R be the number of times red faces appear, and B the number of times blue faces appear.
The random variable R is the sum of 240 draws at random with replacement from
[pick all that are correct]
red, red, blue, blue, green, green
red, 0, 0
1, 0, 0, 0, 0, 0
1, 1, 0, 0, 0, 0
1, 0, 0 0, 1, 0
1, -1, 0, 0, 0, 0
1, 1, -1, -1, 0, 0
1, -1, 0
.......................
Consider the random variable D = R - B. That’s D for “difference.� If all 240 rolls show blue faces, then D = -240; if they all show red faces, then D = 240; otherwise D is somewhere in between. The random variable D is the sum of 240 draws at random with replacement from
[pick all that are correct]
red, red, blue, blue, green, green
red, red, blue, blue, 0, 0
1, 0, 0, 0, 0, 0
1, 1, 0, 0, 0, 0
1, 0, 0 0, 1, 0
1, -1, 0, 0, 0, 0
1, 1, -1, -1, 0, 0
1, -1, 0
...................................
Find E(D)
..................................
Find SE(D)
Please help
A)
1, 1, 0, 0, 0, 0
B)
1, -1, 0
These are wrong
Cheater beware.
A)red, red, blue, blue, green, green
1, 1, 0, 0, 0, 0
1, 1, -1, -1, 0, 0
B)red, red, blue, blue, green, green
red, red, blue, blue, 0, 0
1, 1, -1, -1, 0, 0
C)0
D)7.303
john
c=0 ok
rest wrong
laughing
A)
1, 1, 0, 0, 0, 0
1, 0, 0
0, 1, 0
B)
1, 1, -1, -1, 0, 0
1, -1, 0
C)
0
and D is 7.303?
7.303 is true
d 7.303 is wrong
7.303 is wrong
SE(D) = 0.8165?
SE(D) = 0.8165 is wrong!!!!
Din123
Do you know the answer????
It's right
0.8785
0.8785 is wrong!!
So. You have cheated your way to a meaningless scrap of paper. Well done! I've discovered a fun way to spend my day. Posting wrong answers. You have to decide which are right and which are wrong. Good luck with that!
I didn't answer 0.8785, It was another person. It's ridiculous for people to be putting false answers here.
Even more ridiculous that you are asking for answers for a test.
And even more ridiculous is if u is against to all here, how dare you talk about something because you're here too.
Difference being, I've finished. Without help. Unlike you.
OMG!! Have you finished your test?? And are you spending your Sunday here?? You're a loser!! I'm sorry for you because you must be so lonely!!!
Sunday? It's Monday.
Can somebody put right answer for this?????
No
its okay.!
Too many kids here not being helpful at all and just mocking people, get a life.
I don't know what this is for so I won't give answers exactly:
You can't add up "red" + "red" in any meaningful way so those options fall out, the other ones should be straight forward, is there a difference between 2 in 6 or 1 in 3?
For E(D) just calculate E(D) = E(R)- E(B), how often do you expect red and blue to come out in 240 draws?
For SE(D)= SD * sqrt(n) which will be 12.X
Again you can use any of the dies e.g. 1,1,-1,-1,0,0 = 1,-1,0 to calculate the SD for the die
Thank you so much.!
thanks a lot
Yeah. Thanks. Serious question. Why are you people doing a mooc, when you come here to get all the answers? Every question from weekly assessments, midterm, final - they are all here. Why? I'm just waiting for someone to try and claim credit for a mooc at my university. The laughter will be heard across the oceans. LOL.
This test was so easy. The fact you had to ask for help speaks volumes.
finally Din, which is the right answer?
Idiocracy. It's not a movie.
well i guess you cannot stop cheating only but one should not ignore those who are studying hard with just one aim to learn so its ok this world is full of cheaters or copycats no originality no creativity but you should also keep in mind that still there are some good learners as well
can any one tell me the ans of D plz ???
OK, I will help you for last time. The correct answer is 12.5875
its wrong :(
D)The statistical standard deviation Sigma is the square root of the variance; the variance is described as the average difference from the mean.
How far is each data point from the mean?
1-0=1
1-0=1
-1-0=-1
-1-0=-1
0-0=0
0-0=0
(1^2+1^2+(-1)^2+(-1)^2+0^2+0^2)/6=4/6=2/3
sqrt(2/3)=0.816496580927726
so SD(D)=0.816496580927726
SE=SD*sqrt240=0.816496580927726*15.49193338
=12.64911064
Comments:
0.8165 written above ( in the answers)was SD not SE.
there are 3 reasons for which you do not understand this easy statistic issue:
-teacher did not explained you well enough( which I doubt)
-you are not attentive(which is most likely)
-you are not accurate or you jump directly on seeking answers,without a complete judgement of the problem(100% true, since you are looking for help).
Hope you will learn something after this post.
@seriously- get a life man,what is the meaning of posting wrong answers?
Why? If you undertake a course to gain a certificate - that involves assessment of your knowledge, then getting someone else to answer the questions for you is doing a disservice to everyone doing the course. Can't stop the cheating. But I can have fun playing with heads.
You can't do nothing about stop them cheating , but you have fun leading them in the wrong direction?
This makes you feel better than them?
:))))...don't you feel it's something wrong?
No. they agreed to an honor code. They agreed not to do what they are doing. Buyer beware.
l13
is right
thanks
dr dave
I just wonder how sad your life must be to take enjoyment out of telling wrong answers in an internet forum, posting under multiple names just to screw with people.
Nobody likes others cheating but most people have a life so they don't get worked up over it to such an extend, maybe you should look into that at some point, "Seriously".
C=0 is right
D=12.6490 is right
was trying to follow the conversation, but the truth is that I cannot understand some mental illnesses of two or three of you. if you are really following the honor code, what do you do in these pages? This only reflects that there is something wrong in you. If it really mattered you , just knowing that you did it for yourself you should feel pride but try to make others life miserable only say that you still feel miserable. Do you always follow the honor code? Never cheated your husband / wife? Never have you deceived your boss? Never told a lie? If you answered no to all of the above, (that doubt it) I think that then what is missing in you is a blow to your pride with a little humility. I think that life has treated you hard because you can't take advantage of what is around. You are a ciber-bully! Shame on you! Looking for help, that is not right.
I'll find and 4.u
a)1, 1, 0, 0, 0, 0
1, 0, 0
b)1, 1, -1, -1, 0, 0
1, -1, 0
c)0
d)12.6490