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++++++ Ask your QM I questions and an experienced Success Formula tutor will answer them as soon as possible ++++++
Any problems or questions while studying/preparing for QM I? Don't worry, we've got you covered!
Just post any of your questions in the QM I course on Studydrive (as a separate post, not as a comment) and our professional tutors will help you!!!
We wish you lots of success!
Your Success Formula Team

+8

Success Formula Lena
2065
3 months ago

Hi guys,
Can you please post this as a separate question, not as a comment :) then it is easier for us to answer the questions and for you to see the answers too! Thanks for understanding !

+2

Best Answer

Anonymous Pineapple

1 month ago

Were there any mistakes in the resit??? I need ONE point to pass 🙏🏼🙏🏼

+2

I just don't get it, I get an outcome of 5??

Anonymous Pineapple
1 month ago

For question 3, you can expand the entire equation to:
3((x^2)+2x+1) - 2x - 2 + 15 - (3x^2) + 2x - 15 =
(3x^2) + 6x + 3 - 2x - 2 + 15 - (3x^2) + 2x - 15
The two (3x^2) cancel each other out
The two 2x cancel each other
The two 15s cancel each other
And then you are left with 6x + 3 -2 = 6x +1

Success Formula Lena
2065
1 month ago

Hi there :)
in order to solve that question you have to make use of the price elasticity of demand (it is described in your Math reader under section on average elasticity).
The formula is the following:
(dq/q) / (dp/p) —> where d stands for delta, i.e. the change.
In the question you are given that this price elasticity is equal to -0.2 and they want you to find out the price elasticity, which is dp in the formula. So you want to solve for dp in that formula.
—> so price elasticity = (dq/q) /(dp/p) = -0.2
—> in the question your are also given the change in q (dq), which is the decrease per barrel from 31.3 to 30.5. So dq = - 0.8
—> further you have the current price (p) = 52.5
—> q, the quantity, is your total current supply, the 31.3 (OPEC) + 68.7 (other suppliers) = 100
Plugging this in the formula gives:
(-0.8)/100/(dp/52.5) = -0.2
Now you have to solve this equation for dp
--> dividing two fractions is the same as multiplying the reciprocal
<=> (-0.8/100)*(52.5/dp) = -0.2 | / (-08/100)
<=> 52.5/dp = 25 | * dp
<=> 52.5 = 25dp | :25
<=> 2.1 = dp
This implies that if they cut the supply from 31.3 to 30.5, the price will rise by 2.1 - so Answer D)
We hope this helps!
Your Success Formula Team - Lena

Anonymous Lipstick

3 months ago

Does someone know why the Math exam is out of 22 and not out of 20 ?

+3

Anonymous Music
3 months ago

Because they gave everyone two bonus points for the math part.

+1

Does anyone have the answers to the course assignment of QM1? Would be most grateful. Am willing to pay.

0

Anonymous Dice
3 months ago

check on the portal in my grades how many bonus points you got and add them to your score

+1

Hey everyone, can someone tell me the email address that we can complain to about the exam? I cannot find it somehow 😁

+2

Jana Peters
14424
3 months ago

its not an email adress its a link on the student portal called "exam comments"

Jana Peters
14424
3 months ago

it is not wrong they published that two answers are right for question 40 (see answerkey)

+1

-- QM1 resit tutoring --
Hello everybody,
If you are facing the QM1 resit and you would like some extra help in explaining concepts/reviewing exams etc. then contact me! I really recommend to already start revising now, otherwise you'll be very stressed in resit period.
I have four years of experience tutoring QM1 and QM2 and tutored for the university and as well as privately for both courses, so I know exactly what you have to watch out for. :) My university tutorial groups in QM2 had a 79% passing rate, so if you want to make sure to pass this time around shoot me a message!
I can offer online tutoring, so even if you are living outside of Maastricht most of the time it's not a problem. I can tutor in German, English and Spanish. Right now I am still quite flexible regarding times for tutoring spots so be sure to save your spot now before they run out. :)
You can contact me on Facebook (Lynn Se) or whatsapp (00491789149648).

+2

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Anonymous Flashlight
3 months ago

Hey, I also don't get how to go from the second to last step to the last step. Anyone can explain?

Anonymous Music
updated 3 months ago

It's a bit confusing, but basically you have to rewrite it and see that 0.65 delta x / 5 = 0.13 delta x, same for the y; 0.29 delta y / 3 = 0.097 delta y

+2

Anonymous Music

3 months ago

Last minute help needed!! When I calculate the standard deviation, do I really subtract the mean from every value?? Thank you!!

+2

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Anonymous Music
3 months ago

Thanks a lot!! Is there no faster way to get to the standard deviation? :)

Trial Exam Math 9)
Could anyone explain to me how to derive this function to check on the extreme points?
Thanks

+2

View 1 more comment

enrique pepels
1033
3 months ago

A collegue of yours gave a different answer B... could you let me know what is the right answer?

can someone help me with question 30? I don't know where to start and what to do...

+1

Success Formula Lena
2065
3 months ago

Hi David,
Please find attached my notes. In Q 30, they are looking for the conditional probability.
Hope that helps!
Best,
Your Success Formula Team - Lena

+3

Best Answer

David Sutor
138
3 months ago

Yeah perfect thanks :) took a few detours to understand that you need to combine conditional probability with z scores 🙂

+1

No area was marked for this question

Wat does the sign mean that looks like aan E? (Domain x E R)

+1

Angie Marinelli
11731
3 months ago

It just means that x must be a real number. That's how we used to write it in my high school

Success Formula Lena
2065
3 months ago

It means “element of” so if you write x e(the weird one) R - it means element of all real numbers, as Angie also mentioned :)

+2

Sarah Driesen
250
3 months ago

You have to set the derivative equals to the slope of the tangent line. The slope is -1 (p-x). So you find x=1. Tangent line is y-1 = -1(x-1), so p = 2 (y = -x + 2)

No area was marked for this question

Anonymous Flashlight

3 months ago
- not marked in the document

Is mastery just 100% if you have 1/1 or should you look at the percentages in Sowiso and MSL? I know that in general I had around 94% everytime, however at my scores it does say 1/1. Should I fill in 94 or a 100?

+1

Success Formula Lena
2065
3 months ago

Hi Anonymous Dice,
What you got is correct and then they rearrange it further — I have done the calculation for you.
Don’t ask me why they rearrange it - i don’t know, it is unnecessary for me 🤷🏼♀️🤦🏽♀️
Best,
Your Success Formula Team - Lena

+2

Best Answer

enrique pepels
1033
updated 3 months ago

ME = Z * SE
0.05 = 1.96 * square root of [(0.5 * 0.5)/n]
n = 385
The z depends on 95% confidence level, and you look it up in the table.
SE = square root of [(p*q)/n].
You take 0.5 * 0.5 because they did not mention any p or q and then you use 0.5, always.
Hope this helps!

+3

Hey guys, do you know if we need the mastery or only the progress in sowiso to get the bonus points?

+3

Anonymous Money Exchange
3 months ago

you need to do all the stats stuff online and all the math stuff on sowiso to get half of the bonus points you missed out on during the quizzes

Sandro Esposito
72
3 months ago

Exactly, but some students told me that we only need the progress in sowiso and not the mastery. For Mystablab it's clear for me. We need the mastery

Success Formula Lena
2065
3 months ago

Hi Marloes,
Thank you for posting your question here again. :)
I have calculated it - I hope that helps you.
If this would come up on an exam though, i would probably do it differently: I would still calculate the derivative, but then I would plug in the answer possibility to see which one yields I f’(x)=0 - that would be easier than doing what I did, especially if you don’t know factorization.
Hope that helps.
Your Success Formula Team - Lena

+2

Success Formula Lena
2065
3 months ago

Hi Anonymous Pistol,
In order to answer this question you actually do not have to compute anything - it follows from the definition of a confidence interval.
The 95% interval implies that you are 95% confident that the true proportion lies within the boundaries of your interval, so in this case that it is between 0.6 and 0.7. Also in general, a 95 % confidence interval corresponds to a two-tailed hypothesis test with an alpha level of 5% ( 100 - 95%) .
The hypothesized proportion is 0.63, which is right within that confidence interval. This would mean that you would fail to reject that hypothesis at the 5% alpha level, hence the corresponding p-value (which is the probability of observing such a test statistic or an even more extreme one, if the null hypothesis were true) needs to be larger than 5%.
So just as a general take-away: if the hypothesized value is within the boundaries of the interval, the corresponding p-value will be larger than (100- stated confidence level). If it is not within the confidence interval, then the p-value will be smaller than 100% - CL.
Hope that helps!
We wish you success!
Your Success Formula Team - Lena

+4

Best Answer

Anonymous Bang

3 months ago

Can someone explain how this equals - ln of f(x)? Aren't you supposed to use quotient rule here?

+2

Success Formula Lena
2065
3 months ago

Hi Anonymous Bang,
I have attached my calculation. By using some of the logarithm and simplification rules, you can rearrange the function, which will make the derivative easier - because then you do not need the quotient rule anymore.
I hope that helps!
Your Success Formula Team - Lena

+3

Best Answer

Floris Westerbeek
1571
3 months ago

Because then we're only left with function ln(x) which happens to have no extreme points

Success Formula Lena
2065
3 months ago

Hi Anonymous Noodle Soup,
Floris explanation is correct, but in case you cannot see that immediately, you can also calculate it!
I have attached my calculation and notes, hope that can clarify it further!
Your Success Formula Team - Lena

+3

Best Answer

View 1 more comment

Anonymous Music
3 months ago

Why is it A?

Floris Westerbeek
1571
3 months ago

A convex function is shaped like this: \_/
as you see it has one minimum point and no inflection point (as concavity doesn't change)

Success Formula Lena
2065
3 months ago

Hi Anonymous Trump,
Please find attached my notes :)
What is important here is to remember is that with a tangent line, both the function and the tangent line will have the same slope. With this property, I was able to solve the question.
Does that help? Let me know if you have more questions!
Your Success Formula Team- Lena

+3

Best Answer

Anonymous Dice

3 months ago

why bigger or equal to 1? isn't the ln rule that it should be bigger than 0?

+2

Success Formula Lena
2065
3 months ago

Hey Anonymous Dice,
Please find attached my calculation with all steps. You are right that it is bigger than 0, but by rearranging you will see where the one comes from.
Your Success Formula Team- Lena

+1

Hey,
for exercise 17 ) at a'x( x,y) = -2......
how does the -2 becomes +2( x^2 -y^2)
in the further step ??

+3

Floris Westerbeek
1571
3 months ago

I equated that equation to zero and then brought the 2 to the other side (turning it positive)

+1

Could somebody explain whats happening here? Does it have something to do with the chain rule...?

+3

Alexandre Vervier
258
3 months ago

In fact , you just have to analyse the second term from n'' ( The first one is always positive ) so the change of concavity can just come from e^-(t-3.31)-1 -> So you find that it's = 0 When t = 3.31 ! If you replace t by 2 for example , you 'll find that n''>0 And if you replace it by 4, you find that n''< 0 => At first it's convex and then concave

+1

Best Answer

Floris Westerbeek
1571
3 months ago

the answer for 8 is A (not D). The negative in front of the f and then in front of the x flips it horizontally and vertically.

Floris Westerbeek
1571
3 months ago

the local minimum, and local maximum. There is no inflection point as it's decreasing so there's only 2.