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Nataly_w [17]
2 years ago
14

GIVING OUT BRAINLIETS!!

Mathematics
1 answer:
Annette [7]2 years ago
6 0
Is this algebra one or two please mark me brainlist please I need 1 more
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You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estim
Alenkasestr [34]

Answer:

n  = 400

Step-by-step explanation:

The formula for the error in our estimate is given by:

Standard Error :  √ ( p(1-p)/ n)

Error =  SE = Zα/2   √ ( p(1-p)/ n)  where

Zα/2= critical  value for 95% confidence level = 1.96

and we know our error is 3.5 %

But we do not the sample proportion p. Then what we can do is give an estimate of p in the absence of any other information.

In this case we will use p= 0.5 which is the value that maximizes the expression for the standard error :

if p = 0.8 then SE= 0.040

  p = 0.3 then SE =0.036

  p = 0.1 then  SE = 0.030

  p = 0.5 then SE = 0.050

Substituting

3.5/100  = 1.96 x  √ (( 0.5 x 0.5 ) /n )

3.5/ (100 x 1.96 x 0.5 ) = 1/ √n

0.0357 = 1 /√n

n = 20²

n = 400

3 0
3 years ago
What is 5 times 10 to the fifth?
lys-0071 [83]
5 times 10 to the fifth= <span>500,000</span>
5 0
3 years ago
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I dont k ow what to do on this problem 0.8/71.73
Taya2010 [7]
0.8 divided by 71.73 = 0.01115293461
7 0
3 years ago
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