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ra1l [238]
3 years ago
7

An inspector inspects large truckloads of potatoes to determine the proportion p in the shipment with major defects prior to usi

ng the potatoes to make potato chips. Unless there is clear evidence that this proportion p is less than 0.10, he will reject the shipment. He will test the hypotheses H0: p = 0.10, Ha: p < 0.10. He selects an SRS of 200 potatoes from the more than 5000 potatoes on the truck. Suppose that 12 of the potatoes sampled are found to have major defects. The P-value of this test is:
Mathematics
1 answer:
anastassius [24]3 years ago
8 0

Answer:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info given we got:

z=\frac{0.06-0.10}{\sqrt{\frac{0.10(1-0.10)}{200}}}=-1.89  

And the p value would be given by:

p_v =P(z  

Step-by-step explanation:

Information given

n=200 represent the random sample taken

X=12 represent the potatoes with major defects

\hat p=\frac{12}{200}=0.06 estimated proportion of potatoes with major defects

p_o=0.10 is the value that we want to test

z would represent the statistic

p_v represent the p value

Hypothesis to test

We want to check if the true proportion is less than 0.10 so then the system of hypothesis are:  

Null hypothesis:p\geq 0.1  

Alternative hypothesis:p < 0.10  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info given we got:

z=\frac{0.06-0.10}{\sqrt{\frac{0.10(1-0.10)}{200}}}=-1.89  

And the p value would be given by:

p_v =P(z  

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Step-by-step explanation:

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