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October 10, 2025, 09:14:37 am
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Author Topic: [SUGGESTED SOLUTIONS] Exam 1 and 2 Worked Solutions  (Read 11248 times)  Share 

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BubbleWrapMan

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[SUGGESTED SOLUTIONS] Exam 1 and 2 Worked Solutions
« on: November 06, 2013, 01:05:39 pm »
+14
My solutions for both exams are below.
« Last Edit: November 07, 2013, 08:21:52 pm by Timmeh »
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waterfords69

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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #1 on: November 06, 2013, 01:15:41 pm »
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for question 9ci, if we write g(x)=1/3|f(x+1)| does it still count as correct?
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Damoz.G

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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #2 on: November 06, 2013, 01:19:03 pm »
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Quote from: waterfords69 on November 06, 2013, 01:15:41 pm
for question 9ci, if we write g(x)=1/3|f(x+1)| does it still count as correct?

No, you had to use the actual function of f(x) and make the adjustments to it. Your final answer shouldn't be left with those transformations and "f(x)". If the function is given (which it was), it must be used to get full marks for the question. :)
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silverpixeli

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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #3 on: November 06, 2013, 01:41:21 pm »
+1
Sweet solutions thanks man
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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #4 on: November 06, 2013, 03:44:41 pm »
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For 9 ci
I left my answer as a hybrid function, would that be ok?
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Damoz.G

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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #5 on: November 06, 2013, 03:47:34 pm »
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Quote from: Alienmobman on November 06, 2013, 03:44:41 pm
For 9 ci
I left my answer as a hybrid function, would that be ok?

I believe you would still get the marks as long as the two rules are correct and a domain was included for each. :)
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Alienmobman

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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #6 on: November 06, 2013, 04:12:02 pm »
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Sick cheers Damoz!

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mano91

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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #7 on: November 06, 2013, 09:31:49 pm »
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q8 should be 2+ 4/pi  right?

check the negative sign on your solutions.
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silverpixeli

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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #8 on: November 06, 2013, 10:05:00 pm »
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Quote from: mano91 on November 06, 2013, 09:31:49 pm
q8 should be 2+ 4/pi  right?

check the negative sign on your solutions.

Pretty sure it's negative
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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #9 on: November 06, 2013, 10:09:28 pm »
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I'll do it without simplifying any negatives from the start and showing more working than needed.

Which is what Tim has.
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BubbleWrapMan

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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #10 on: November 06, 2013, 10:10:57 pm »
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Also the expected value of wouldn't be more than 2 since from the density function.
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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #11 on: November 06, 2013, 10:12:56 pm »
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It can't be 2+4/pi because it's asking for the mean which surely has to be within the domain of [0,2], also 2-4/pi approximates to just under 1 because 4>pi which makes sense as the mean of a cos distribution if you look at the graph, the first quarter of a cos graph, the mean should be a little to the left of the middle value of 1 because that's where most of the area is
Beaten twice sigh
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Re: [SUGGESTED SOLUTIONS] Worked Solutions pdf
« Reply #12 on: November 06, 2013, 10:58:27 pm »
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My mistake!
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BubbleWrapMan

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Re: [SUGGESTED SOLUTIONS] Exam 1 and 2 Worked Solutions
« Reply #13 on: November 07, 2013, 08:22:24 pm »
+2
Exam 2 solutions in first post
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Damoz.G

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Re: [SUGGESTED SOLUTIONS] Exam 1 and 2 Worked Solutions
« Reply #14 on: November 07, 2013, 08:25:51 pm »
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Quote from: Timmeh on November 07, 2013, 08:22:24 pm
Exam 2 solutions in first post

Thank you very much!


OMG! I guessed the Equation of the second tangent equation, and I got it correct!!!! :D :D :D :D :D :D :D :D :D :D :D :D
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