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2 years ago

How many days is in:3 weeks5 weeks7 weeks9 weeks

Mathematics

2 answers:

sweet [91]2 years ago

8 0

Answer:

3 weeks 21 days, 5 weeks 35, 7 weeks 49, 9 weeks 63 days

Step-by-step explanation:

Each week is 7 days

marishachu [46]2 years ago

7 0

3 weeks- 21 days
5 weeks- 35 days
7 weeks- 49
9 weeks- 63

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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

Margin of error : E= 5% =0.05

Critical z-value for 90% confidence interval : $z_{\alpha/2}=1.645$

a) Prior estimate of true proportion: p=28%=0.28

Formula to find the sample size :-

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

Required minimum sample size= 219

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

Formula to find the sample size :-

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Required minimum sample size= 271

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3 years ago

How many days is in:3 weeks5 weeks7 weeks9 weeks​

How many days is in:3 weeks5 weeks7 weeks9 weeks