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Hi dear Alison, will we just skip the Likelihood and go Chapter 8 directly?

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Your homework that is due in on Tue 18th Dec is Q 5.5, 5.6, 6.5, 6.7, 7.5, 7.6.

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Your homework that is due in on Tue 29th Oct is Q 3.4, 3.8, 3.10. If you want to ask any further questions about these tasks, please post them here or come to the drop in session on Tues morning.

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Exercises booklet question 2.5 answer part

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Exercises booklet question 2.5 answer part

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I think there is a type error in question 2.5 part a
where If k=1 expectation of x=alpha/beta instead of a/b. Correct me If I am wrong?
thanks

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1.2: Distribution functions & their properties: unsure how 3rd property is distinct from the 1st property

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1.2: Distribution functions & their properties: unsure how 3rd property is distinct from the 1st property

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When determining if F(x) is a distribution function, one of the properties is that "F(x) is right-continuous and has left limits". I am confused how to define this more precisely and thereby check if F(x) has this property.

My intuition tells me that the property refers to having a left-limit of F(x)=0 and being right continuous with F(x)=1, but that is already shown by the first property of distribution functions ("0<=F(x)<=1, with lim(x¬> -inf) F(x) = 0 and lim(x¬> inf) F(x) = 1" ).

Thus I either don't understand the 3rd property, or I don't understand how the 3rd property is distinct from the 1st.

Many thanks to anyone who can help me out - it ain't much to be stuck on, but it's honest work :)

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Your homework that is due in on Tue 15th Oct is Q 1.4, 1.10, 2.2, 2.3. If you want to ask any further questions about these tasks, please post them here or come to the drop in session on Tues morning.

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This board is for students in SoMaS at Sheffield taking MAS223 in 2019/20.

Have a question about something covered in the lectures, your exercises, or just generally about the set-up of the course? Start a post! Click the + button in the bottom right of your screen.

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For part (e) of this question, what is the difference between E[U|V=v] and E[U|V]

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Dear Alison,

I am struggling to understand how the last two lines of the first part of the question simplify to e^(σ^2/2). Could you explain it in a bit more detail for me please? Thanks

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I've had a look through the emails that happened around the time of the strike, but I am still a bit confused. Could we get a clarification of what is still examinable? I know chapter 8 is not, but are any minor sections going to be missed off

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For question 1.11d when you calculate the integral of yfy(y)dy in you example shouldn't it be 2 instead of 2/3?

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I can't seem to get the right answer using R for the probabilities bit at the end of this question. I've been using dhyper(0,10,37,2) = 0.616, what am I doing wrong?

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Why does this become a + instead of a - ?