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gladu [14]
3 years ago
9

On an international​ exam, students are asked to respond to a variety of background questions. For the 41 nations that participa

ted in the​ exam, the correlation between the percentage of items answered in the background questionnaire​ (used as a proxy for student task​ persistence) and mean score on the exam was 0.793. Does this suggest there is a linear relation between student task persistence and achievement​ score? Write a sentence that explains what this result might mean.
Mathematics
1 answer:
nignag [31]3 years ago
8 0

Answer:

Correlation is a measure of linear relationship.

Step-by-step explanation:

We are given that a correlation of 0.793 was found between the items answered and the mean score in a test.

  • Correlation helps us to to know how to variables are related to each other.
  • It is a statistical technique  that help us to know type of relation between two variable. It may be a direct relation or a inverse relation.
  • In other word, correlation is basically a measure of linear relationship between two variables.
  • The correlation ranges from -1 to 1. A correlation between 0.7 and 1 is considered to be a strong correlation.
  • A correlation of 0.793 means that there is a strong linear relationship between the two variables.
  • Yes, there is a linear relationship between the number of questions answered and the mean score of test.
  • So, it can be said as the number of questions answered increases, the mean score increases as well.
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Answer:

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Step-by-step explanation:

<u>Price times tax rate = sale</u>

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3 years ago
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This figure shows three identical spherical billiard balls of diameter 6 cm inside an equilateral triangular frame.
Alenkasestr [34]

Answer:

Perimeter = 18(1 + √3 ) cm

Step-by-step explanation:

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If we now draw a line from the vertex of the big triangle to the center of the ball we get 2 right triangles, and they are 30-60-90 triangles.

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There are 6 of these sides in the big triangle so their total length =

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Dafna1 [17]

Answer:

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The given parameters are;

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