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Class 11 Economics (Statistics For Economics) Chapter 7 Correlation Quiz 5 (25 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. Name the correlation in this sentence:The number of people in an audience and ticket sales.

Correct Answer: B) Positive Correlation.

2. Describe the correlation: "The age of a car and its selling price."

Correct Answer: B) Negative.

3. R =-0.3 is considered to have .....

Correct Answer: B) Weak negative correlation.

4. What does statistical analysis determine?

Correct Answer: C) How likely any difference between experimental groups is due to chance.

5. The number of siblings you have and your weight.

Correct Answer: C) No correlation.

6. DESCRIBE THE LIKELY CORRELATION BETWEEN LENGTH OF TIME CANDLE BURNS AND HEIGHT OF WAX REMAINING

Correct Answer: B) NEGATIVE.

7. If every brother is exactly two inches taller than his sister, what would the correlation between the heights of brothers and sisters be?

Correct Answer: D) 1.

8. Name the correlation in this sentence:The average temperature in a city and the number of speeding tickets in the city.

Correct Answer: C) No Correlation.

9. What is the range of values that r can be between?

Correct Answer: C) Between-1 and 1.

10. DESCRIBE THE LIKELY CORRELATION BETWEEN NUMBER OF HOMEWORK ASSIGNMENTS SUCCESSFULLY COMPLETED ANDSCORE ON NEXT TEST

Correct Answer: A) POSITIVE.

11. What is a line of best fit used for?

Correct Answer: A) To make predictions.

12. Number of steps taken per day and number of kilometers walked per day. $r=.92$

Correct Answer: A) Strong positive.

13. If correlation value is 0.4, then what is correlation for that?

Correct Answer: B) Positive correlation.

14. In a scatterplot, an outlier .....

Correct Answer: C) Is a point that is far outside the main cluster of points/ordered pairs.

15. What type of correlation (association)?Ice cream sales and shark attacks.

Correct Answer: A) A) Positive correlation.

16. Average fat intake per citizen of a country and average cancer rate of a country. $r=.73$

Correct Answer: A) Strong positive.

17. What does a correlation coefficient of-1 represent?

Correct Answer: B) A strong negative correlation.

18. Calculate the correlation coefficient for this data set and round to 3 places after the decimal.(1, 4), (5, 4), (6, 9), (7, 12)

Correct Answer: A) $.779$.

19. What is relationship between two variables called?

Correct Answer: C) Correlation.

20. Which value of r represents data with a strong negative correlation between two data sets?

Correct Answer: B) -0.89.

21. Hours of studying vs. grades

Correct Answer: A) Positive Correlation.

22. George finds that the longer he exercises, the less he weighs. The relationship between exercise & weight may be described as a(n) ..... correlation.

Correct Answer: B) Negative.

23. What does r$^{2}$ tell us?

Correct Answer: C) How much the x variable affects the y variable.

24. How tall a person is and how fast they drive

Correct Answer: C) No Correlation.

25. What is a replicate in research?

Correct Answer: C) Repeating an experiment using different samples to determine reliability.

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