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soccercrazygal
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#41
Report Thread starter 15 years ago
#41
(Original post by chandoug)
q7 (combining of normal distributions)
does 0.9032 or 0.881 ring a bell?
thats exactly what i got!!!!
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chandoug
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#42
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#42
yay finally some1 that agrees with me
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candy88524
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#43
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#43
(Original post by chandoug)
yay finally some1 that agrees with me
how do you start a new thread?
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beauford
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Rep:
?
#44
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#44
(Original post by candy88524)
how do you start a new thread?
On the subforum there is an icon at the top left (i think) saying psot new thread.

Anyway, can someone please confirm whether my answer for q. 6 is right.

This is the full question:

6) 3 dice, assumed to be fair, are rolled and the number of sixes is recorded. The set of 3 are rolled 250 times in total, with X, the number of sixes on each roll, written down.

Observed: x = 0, 125, x=1, 109, x=2, 13, x=3, 3.

a) Write down a suitable model for X (2)

b) Test whether your model is suitable for this data using a 1% significance level, stating your hypotheses clearly (11)

c) Say how your test would be affected if the dice were not assumed to be fair. (2)
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soccercrazygal
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#45
Report Thread starter 15 years ago
#45
(Original post by beauford)
Anyway, can someone please confirm whether my answer for q. 6 is right.

This is the full question:

6) 3 dice, assumed to be fair, are rolled and the number of sixes is recorded. The set of 3 are rolled 250 times in total, with X, the number of sixes on each roll, written down.

Observed: x = 0, 125, x=1, 109, x=2, 13, x=3, 3.

a) Write down a suitable model for X (2)

b) Test whether your model is suitable for this data using a 1% significance level, stating your hypotheses clearly (11)

c) Say how your test would be affected if the dice were not assumed to be fair. (2)
i didnt do it ur way so i have no ideA! yes it would be great if someone could confirm the answer!!!!
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