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Urgent s2 help!

Chapter 7 - Hypothesis.

Someone please explain to me why the probability is 0.5????
isnt it 4/5???
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hajs
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ANYONE? plsssssss
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TeeEm
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Original post by hajs
Chapter 7 - Hypothesis.

Someone please explain to me why the probability is 0.5????
isnt it 4/5???


H0: p=0.5 there is no preference between margarine and butter (equally preferred)
H1: p>0.5 there is preference for margarine

Let X be the number of people in a sample of 5 who prefer margarine
Binomial model X ~B(5,0.5)

P(X>=4) = ...


I can see why this question is confusing.
(edited 9 years ago)
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hajs
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Original post by TeeEm
H0: p=0.5 there is no preference between margarine and butter (equally preferred)
H1: p>0.5 there is preference for margarine

Let X be the number of people in a sample of 5 who prefer margarine
Binomial model X ~B(5,0.5)

P(X>=4) = ...


I can see why this question is confusing.


Yeah thank you, but how would you know this, because all binomial has two outcomes, so it cant always be 0.5?
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hajs
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*BUMP*
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TeeEm
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Original post by hajs
Yeah thank you, but how would you know this, because all binomial has two outcomes, so it cant always be 0.5?


look at post 3 again the bits in bold and in colour

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