¿ Que forman el movimiento de la expansion ?

Geography

1 answer:

Vedmedyk [2.9K]3 years ago

3 0

Answer:

Las Zonas de Expansión son aquellos lugares donde las placas de la corteza terrestre se están separando, impulsadas por las corrientes ascendentes del manto superior, dando lugar a la salida de magma procedente de interior.

Explanation:

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Search for 39 05 52.46N 84 30 56.16E and zoom out to an eye altitude of ~30,000 ft. The large-scale structures in this sedimenta

klio [65]

Answer:

c. Eolian

Explanation:

By observing the environment presented in the question above, we can identify the presence of many sand sheets and different types of dunes. These characteristics are directly related to Eolian Environments, which are those where the wind is the main means of transporting sediment and presents a predominance of sand, like the environment presented in the question. These environments are usually drier and have a low concentration of water.

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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.