What is the solution to the system of equations l? y= 1/2x-6 x=-4
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Answer:
We need an SRS of scores of at least 153.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find M as such
In which is the standard deviation of the population and n is the size of the sample.
How large an SRS of scores must you choose?
This is at least n, in which n is found when . So
Rounding to the next whole number, 153
We need an SRS of scores of at least 153.
Answer:
<em>Explicación más abajo</em>
Step-by-step explanation:
Integración Indefinida
La integral
Se resuelve con el cambio de variables:
t=arcsen(x)
Una vez hechos los cambios, la integral se resuelve en función de t:
Hay que devolver los cambios para mostrarla en función de x.
El cambio de variables también se puede escribir:
x=sen(t)
Recordando que
Entonces:
Devolviendo los cambios:
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