What is 1000 is 1/10 of
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Answer:
sample size if he uses a previous estimate of 32% is 523
sample size if he does not use any prior estimates is 601
Step-by-step explanation:
estimate E = 4 percentage = 0.04
confidence Cl = 95% = 0.95
previous estimate p = 32% = 0.32
q = 1 - 0.32 = 0.68
to find out
size of sample
solution
first we calculate z value for 95% confidence E = 0.04 is 1.96
from probability P(-1.96 < z < 1.96) = 0.95)
here z = 1.96
so in 1st part size of sample we know
E = z ×
put all value E, z p and q and we get n
n = (z/E)² ×p×q
n = (1.96/0.04)² ×0.32×0.68
n = 523
sample size if he uses a previous estimate of 32% is 523
now in 2nd part we take p = 0.5
so n will be
n = (z/E)² ×p×q
n = (1.96/0.04)² ×0.5×0.5
n = 601
sample size if he does not use any prior estimates is 601
<h3>Given:</h3>
- Trapezium
- Length of BC
- Value of "x"
We can divide the given shape into a triangle and a rectangle.
We'll have to use Pythagoras Theorem.
In this question we have to find the hypotenuse so we'll have to add.
Let's substitute the values according to the formula.
Now, we can find the value of "x"
- Adjacent= 7 cm
- Opposite= 6 cm
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We can use any one from SOHCAHTOA.
Here I'm using tan.
Let's substitute the values according to the formula.
We'll have to use tan inverse.