Hi Donald,
First, I would like to thank you for replying.
I used Comparing Two Proportions to test, but someone told me that my
P-value does not look right. Please tell show me where the mistakes are
Phat= 2/50 = 0.04
z= (.04-.10)/(0.04-0.10)/sqrt((0.10 * 0.9)/50)= -1.41
p-value = (1- 0.0808) = 0.9192
"Donald F. Burrill" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> On Tue, 30 May 2000, John Lexmark wrote:
>
> > Please help me to solve this problem, I am stuck...
>
> That's not very informative. WHERE are you stuck, precisely?
> (I've labelled various points throughout your original post to help
> you answer this question. While we're about it, what textbook are you
> using in class?)
>
> > An inspector inspects large truckloads of potatoes to determine the
> > proportion p in the shipment with major defects prior to using the
> > potatoes to make potato chips. [A]
> > Unless there is clear evidence that this proportion is less than 0.10
> > she will reject the shipment. [B]
> > To reach a decision she will test the hypotheses [C]
> >
> > H0: p=0.10, Ha: p<0.10 [D]
> >
> > Using the large sample test for a population proportion. [E]
> > To do so, she selects an SRS of 50 potatoes [F]
> > from the more than 2000 potatoes on the truck. [G]
> > Suppose that only 2 of potatoes sampled are found to have major
> > defects. [H]
> > Determine the P-value of her test. [I]
>
> I should perhaps warn you that if you're stuck at [A], there's probably
> not a lot any of us can do to assist you.
> As well as indicating where you're stuck, please say how you're stuck.
> It's one kind of difficulty if you don't understand the language or terms
> used in setting the problem; it's another if you've attempted to apply
> what you think is an appropriate procedure and got nonsense; it's yet
> another if you think you know (or know of) an appropriate procedure, but
> don't see how to apply it in this case; for example.
> -- DFB.
> ------------------------------------------------------------------------
> Donald F. Burrill [EMAIL PROTECTED]
> 348 Hyde Hall, Plymouth State College, [EMAIL PROTECTED]
> MSC #29, Plymouth, NH 03264 603-535-2597
> 184 Nashua Road, Bedford, NH 03110 603-471-7128
>
>
>
>
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