Which group was NOT one of the barbarian tribes that invaded the late Roman Empire?

Advanced Placement (AP)

1 answer:

Sever21 [200]3 years ago

8 0

Answer:

Many of the groups that attacked and invaded the Roman Empire were Germanic tribes from Northern Europe. Goths - One of the most powerful and organized groups of barbarians were the Goths. The Goths were divided into two major branches: the Visigoths and the Ostrogoths.

Explanation:

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Answer:

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3) Arabs adopted Indian customs and traditions while, at the same time, they spread Islam.

4) Islamic governments adopted some Indian political traditions.

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A teacher collected information from a class of 25 students about the time, in hours, they spent studying the previous week and

djverab [1.8K]

Answer:

B. −0.72

Explanation:

The correlation coefficient is a measure of the linear association between two variables.

It is a dimensionless value bettween - 1 and +1. Hence, it does not depend on the units that are used to measure the data.

You can see the formula to calculate the correlation coefficient in the attached picture.

There you see that the numerator containts the sum of the differences of the values of the x-variable with its the mean, multiplied by the sum of the differences of the values of the y variable with its mean, while the denominator contains the square root of the product of the squares of the same differences, thus the units are canceled.

In conclusion, If the teacher changes the units of each variable from hours to minutes, the value of the correlation coefficient between minutes studying and minutes spent on the Internet will not change; it will continue being −0.72.