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sasho [114]
3 years ago
13

Please help answer correctly !!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
zubka84 [21]3 years ago
8 0
Well.. the equation for the interior angles of a polygon is 180(n-2). So it could possibly be 180.


Hope I could help.
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Kamila [148]

Answer:

Step-by-step explanation:

Solution:-

- The sample size = n

- The Error of estimation, E = 0.04

- The confidence level, CI = 99%

a)

What size sample should be obtained when she uses previous estimate of p = 0.52​?

- We are given the sample proportion p = 0.52, the required sample size is a function of confidence value and error of estimation (E):

                 n = p*( 1 - p ) * (\frac{Z-critical}{E})^2

Where,

- The critical value of the confidence level = 99% would be:

           significance level ( α ) = 1 - CI = 1 - 0.99 = 0.01

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- The required sample size (n) can be calculated:

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b)

- If the preliminary estimate of proportion is missing or not given, we are to assume the proportion p = 0.5.

- Similarly, repeat the calculations for sample size (n) when p = 0.5

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- Hence, the minimum required sample size (n) should be = 664 adults.  

5 0
3 years ago
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