3 years ago

*WILL GIVE BRIANLIEST**BRIANLIEST WILL BE GIVEN*(08.06 LC)

Mathematics

1 answer:

alexgriva [62]3 years ago

6 0

Add the equations to eliminate p. That leaves w open to solve.

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Step-by-step explanation:

The formula to find the sample size is given by :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$ , where p is the prior estimate of the population proportion.

Here we can see that the sample size is inversely proportion withe square of margin of error.

i.e. $n\ \alpha\ \dfrac{1}{E^2}$

By the equation inverse variation, we have

$n_1E_1^2=n_2E_2^2$

Given : $E_1=0.05$ $n_1=1000$

$E_2=0.025$

Then, we have

$(1000)(0.05)^2=n_2(0.025)^2\\\\\Rightarrow\ 2.5=0.000625n_2\\\\\Rightarrow\ n_2=\dfrac{2.5}{0.000625}=4000$

Hence, the sample size will now have to be 4000.

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3 years ago

PLZZZ HELP!

Helga [31]

bought for $180000 in 2002

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you start hiking at an elevation that is 80 meters below base camp. You increase your elevation by 42 meters. what is the new el

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<span>38 m below base camp.</span>

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Answer:

B: 378 cm^2

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