3 years ago

Any body got answer?

Mathematics

1 answer:

Yuliya22 [10]3 years ago

7 0

240 centimeters why because i need point I don’t rlly know

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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

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3 years ago

Analyze this equation.

sammy [17]

The answer is b. Hope this helped

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The volume of the cube would be 193.8. Solution

Volume = L x W x H
Volume = 19 x 1.7 x 6
Volume = 193.8

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18. During a clothing store's Bargain Days, the regular price for T-shirts is discounted to $8.25.

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Answer:

3.25

Step-by-step explanation:

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