i went through the whole paper without using the normal distribution, and this didnt occur to me until I neared the end of the exam! Like yourself, I couldnt find the values I needed for any of them (i.e. z or the standard deviation or the variance)(Original post by Willa)
yea todays s2 was a ***** - it's cos they werent expressley saying which distribution to you, and so i couldnt think of the parameters i need to use in any of them - GRRRR
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MEI S2 easier than S1??? your views watch
- 12-06-2004 14:01
(Original post by Willa)
- 12-06-2004 14:03
yea that question which said "Use the possion distribution to find the expected frequencies correspondign to the given frequencies" - i was like "WTF!?".
I hope that what it was asking you to do is use the possion distribution to predict the frequencies, and then compare those to the actual frequencies and see if it's a good fit!
What did others do?
(Original post by Katie Heskins)
- 12-06-2004 14:05
yeh I did that....and found it was a good fit....did u get that??
did you get the last bit...show something or antoher = 66p?
- Thread Starter
(Original post by physicsboy)
- 12-06-2004 14:09
i read this question aboutr 16 times, and still didnt understand it. There were others in my year who felt the same so I knew it wasnt just me being thick! The last part of that question, when it changed to a 60 hour interval was really badly worded too!
The with your probabilities multiply it by 40 to get your expected frequencies, does anyone remember working through it in the Poisson chapter of the text book???