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2 years ago

Which country has the largest natural gas reserves

Geography

1 answer:

Oksi-84 [34.3K]2 years ago

3 0

Answer:

Russia

Explanation:

24.3% of the world's share comes from Russia! That's the most

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Arrange the inventions and developments in chronological order. radio airplane moving assembly line telephone

djyliett [7]

Answer:

<h2>First ,Alexander Graham Bell invented the telephone.</h2><h2>Secound, Guglielmo Marconi invented radio.</h2><h2>Third, Wright brothers invented aeroplane.</h2><h2>And finally Henry Ford invented moving assembly.</h2>

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3 years ago

Why would the magnetic surface be different for different locations on the earth.

Sholpan [36]

The Earths magnetic field spreads across the whole globe, so thats why theyre all different. I hope this helped, and good luck!

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3 years ago

How would heath care affect infant mortality rates and contraceptive use?

denis23 [38]

Answer with explanation:

Infant mortality rates would decrease. Greater quality or more widespread health care makes medical experts more accessible, so more people would have access to doctors and high-quality resources when their infant needs it.

A greater population would use contraceptives. Health care makes health supplies more accessible. More people would be able to afford and attain some form of contraceptives.

8 0

3 years ago

Choose the description that best matches the term "polyandry."

Romashka [77]

system that allows a woman to marry more than one man at a time

Hope this helps! ^_^

4 0

3 years ago

ACT scores of a sample of UTC students are shown below. Student ACT Score A 22 B 28 C 20 D 21 E 28 F 23 G 26 a. Compute the mean

alisha [4.7K]

Solution :

a). Let x denotes ACT scores.

ACT scores = $\{ 22,28,20,21,28,23,26 \} ; n = 7$

Mean, $(\overline x)=\frac{\sum x_i}{n}$

$=\frac{168}{7}=24$

Sample variance, $S^2=\frac{1}{n-1}\left(\sum x_i^2-n\overline x^2 \right)$

$=\frac{1}{6}(4098-7 \times 24^2)$

$=\frac{66}{6}$

= 11

b). To test whether or not variance of ACT scores of population (say $\sigma^2$ ) of the UTC students is significantly more than 8.

Consider the hypothesis :

$H_0: \sigma^2 \leq8$ vs $H_a: \sigma^2 >8$

It is a right tailed test and α = 0.05

We have

$x^2_{n-1} = \frac{(n-1)s^2}{\sigma^2}$

So test statics is

$x^2_7=\frac{(7-1)11}{8}$

$=\frac{6 \times 11}{8}$

= 8.25

Since our $\text{test statistics is less than the critical value }$ and it falls in a acceptation region, hence we fail to reject $H_0$ and conclude that variance is not greater than 8 significantly.

8 0

2 years ago