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3 years ago

What happens when thin oceanic crust and thick continental crust push against each other?

Geography

1 answer:

brilliants [131]3 years ago

5 0

Number 1 is correct sir

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On the island of Hawaii, Keanu notices that the sand on the beach is black the same color as a rock formation on the island. Kea

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3 years ago

Analyze the image below and answer the question that follows.

Alchen [17]

Answer:

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Explanation:

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3 years ago

Which one the following is not an example of internal migration <br>

Helen [10]

Answer:

I moved to Khulna from Dhaka.

Explanation:

Internal migration is a type of movement where human movement happen within a country. Here Khulna and Dhaka are major cities of Bangladesh.

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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.

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3 years ago

Which is a correct statement about natural resources

Evgesh-ka [11]

Answer:

C. Areas rich in natural resources tend to transport them worldwide.

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3 years ago

Read 2 more answers