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storchak [24]
3 years ago
13

Plz help I need help plz

Mathematics
2 answers:
drek231 [11]3 years ago
7 0

Answer:

Step-by-step explanation:

-15 divided by 3/5 is equal to

-15/1 times 5/3

-15 * 5 = -75

1 times 3 is 3.

-75/3 = -25. The answer is -25

maks197457 [2]3 years ago
5 0

Answer:

-25

Step-by-step explanation:

The answer is correct

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Step-by-step explanation:

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damaskus [11]

Answer:

Following are the solution to this question

Step-by-step explanation:

Please find the complete question in the attached file.

In point a:

a=0.05 \\\\| Z(0.025)|= 1.96  \text{(check in normal table)} \\\\ 95 \% \  CI \\\\\bar x  \pm  \ Z \times \frac{s}{\sqrt{n}}\\\\\to 80 \pm  1.96 \times \frac{15}{\sqrt{60}} \\\\\to (76.20448, 83.79552)

In point b:

95 \%  \ CI \ is \\\\ \bar x  \pm  Z \times \frac{s}{\sqrt{n}}\\\\\to  80 \pm 1.96 \times \frac {15}{\sqrt{120}}\\\\\to (77.31616,  82.68384)

In point c:

A large sample is a smaller error margin.

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3 years ago
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The answer is 150in squared. 

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"Two significant figures" means that a digit after the second one could actually be anything ... it wasn't measured. 'X' could be anything from 230 to 239. 'Y' could be anything from 400 to 409. The greatest possible value of that fraction is. (239)/(409 squared) .
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