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2 years ago

Method to use f(x) =-2x-2

Mathematics

1 answer:

olga_2 [115]2 years ago

8 0

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You are trying to estimate the average amount a family spends on food during a year. In the past the standard deviation of the a

svetoff [14.1K]

Answer:

$n=(\frac{2.58(1000)}{50})^2 =2662.56 \approx 2663$

So the answer for this case would be n=2663 rounded up to the nearest integer

Step-by-step explanation:

We have the following info:

$ME = 50$ margin of error desired

$\sigma = 1000$ the standard deviation for this case

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =50 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 99% of confidence interval now can be founded using the normal distribution. The significance is $\alpha=0.01$ . And for this case would be $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(1000)}{50})^2 =2662.56 \approx 2663$

So the answer for this case would be n=2663 rounded up to the nearest integer

5 0

3 years ago

10 1/2 x 2 2/3= 3 1/3 x 4 2/7= 7/2 - 4/5=

Ira Lisetskai [31]

10 1/2 x 2 2/3= 28, 3 1/3 x 4 2/7= 14.2857142857, 7/2 - 4/5= 2.7

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3 years ago

If 1=3 2=3 3=5 4=4 5=4, then 6=?

jeyben [28]

Answer:

six equal to eight?????

7 0

3 years ago

6.200,6.532,6.6,6.4

Anton [14]

From lea st to greatest it would be 6.200, 6.4, 6.532, and 6.6

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3 years ago

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Given the equation g(t) = 4*, what is the average rate of change from 0

Sholpan [36]

I didn’t understand why she didn’t answer me because she was doing something like a teacher she was gonna

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4 years ago