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Lubov Fominskaja [6]
3 years ago
11

Hellllpppppppppppppp

Mathematics
1 answer:
alexandr402 [8]3 years ago
6 0
It should be 54 because height times width
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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
PLZZ HELP!!! ⚠️⚠️ ATTACHED AND NEEDS DONE ASAP!
Nataly [62]

Step-by-step explanation:

change the unit

50 km per 1 hour

50 km/h = 50,000 m/ 3600 s = 13.8 m/s

the lorry speed is 13.5 m/s or 0.3 m slower than the limit

8 0
3 years ago
Someone please help!
valentina_108 [34]

Answer:

x = 33

Step-by-step explanation:

8 0
2 years ago
wilson bought gift cards for some lawyers and their assistants. each lawyer got a gift card worth $l. each assistant got a gift
-Dominant- [34]
Im pretty sure it would be 64la
6 0
3 years ago
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Which best explains why state governments are better able to focus on the needs of their citizens than the federal
sesenic [268]

Answer:

The state governments are able to focus entirely on the citizens that live there. The federal government has to deal with wide spread, national issues, and would not provide the care and attention that the smaller state governments can.

Step-by-step explanation:

4 0
3 years ago
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