Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_vufgb-correlation-002-en_vufgb-correlation-002-en
   name	vufgb-correlation-002-en
   section	Inferential Statistics/Sampling Distributions/Correlation
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	Calculation
   Program
   Language	English
   Level	Statistical Thinking

   Question

   In a sample, a correlation of 0.64 is found between two variables x and y. The standard deviation of x is 24, and the standard deviation of y is 18.

   Calculate the regression coefficient b.

   
   
   1. TRUE: 0.48
   2. FALSE: 0.55
   3. FALSE: 0.64
   4. FALSE: 0.85
   
   

   Solution

   Use the formula on the formula sheet for correlation (Chapter 9).

   Filling it in gives $0.64 = \frac{24}{18 \times b}$. Describe gives $b = 0.64 \times \frac{18}{24} = 0.48$.

   
   
   1. Correct
   2. Incorrect
   3. Incorrect
   4. Incorrect