3 years ago

Describe the shape of the graph

Mathematics

1 answer:

wlad13 [49]3 years ago

4 0

Answer:

Pyramidal

Step-by-step explanation:

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If im doing right....

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Answer: a) Required minimum sample size= 219

b) Required minimum sample size= 271

Step-by-step explanation:

As per given , we have

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$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.28(1-0.28)(\dfrac{1.645}{0.05})^2\\\\=218.213856\approx219$

Required minimum sample size= 219

b) If no estimate of true proportion is given , then we assume p= 0.5

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