Question: This is only multiple choice. Provide brief explaination thank you. -_1. Correlation between two variables (Varl and Var2) is 0.65. Now. after adding numeric 2

This is only multiple choice. Provide brief explaination thank you.

-_1. Correlation between two variables (Varl and Var2) is 0.65. Now. after adding numeric 2 to all the values of Varl. the correlation coefficient will_.._ - ? A. Increase B. Decrease C. None of the above ._2. It is observed that there is a very high correlation between math test scores and amount of physical exercise done by a student on the test day. What can you infer from this? 1. High correlation implies that after exercise the test scores are high. 2. Correlation does not imply causation. 3. Correlation measures the strength of linear relationship between amount of exercise and test scores. A. Only 1 B. 1 and 3 C. 2 and 3 D. All statements are true _3. What is the relationship between significance level and confidence level? A. Significance level = Confidence level B. Significance level = 1- Confidence level C. Significance level = 1/Confidence level D. Significance level = sqrt (1 - Confidence level) _4. Which of the graph below has very strong positive correlation? A. B. 7 . C. D

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