Statistics/Probability questions...

1) How do I tell if the model accurately predicted the sales?
2) What is the "p" in this problem/what do I do with it? : "Assume p = 0.05"
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I attached the full problem and a clearer version of what I think is called a 'Chi Squared Critical Values Chart.'
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Could someone run me through how to do this problem?

Question

Statistics/Probability questions...


1) How do I tell if the model accurately predicted the sales? 
2) What is the "p" in this problem/what do I do with it? : "Assume p = 0.05"
___

I attached the full problem and a clearer version of what I think is called a 'Chi Squared Critical Values Chart.'
___

Could someone run me through how to do this problem?

anonymous · Answer

attachment

lynfran · Answer

you shd start by finding the degree of freedom do u know how to do that?

anonymous · Answer

No, I don't. I asked my proctor to help me, but he didn't know how either.

lynfran · Answer

ok there a formula for that (C-1)(R-1) where C represent the total # of column  and R represent the total # of rows

anonymous · Answer

(12-1)(35-1)?

lynfran · Answer

no there 2 columns the expected and the observed ....and there 3 row.,vanilla, strawberry and chocolate

lynfran · Answer

correct now take away and then multiply out the brackets to get the df

anonymous · Answer

2

lynfran · Answer

correct the next step is to find the chi square value and there a formula for that also

lynfran · Answer

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