Correlation coefficient tells about the strength ( Strong , moderate or weak ) and direction ( positive or negative) of the relationship between two quantities.
Strong correlation: The value of correlation coefficient lies between -1 to -0.5 or 0.5 to 1.
Moderate correlation : The value of correlation coefficient lies between -0.5 to -0.3 or 0.3 to 0.5.
Weak correlation : The value of correlation coefficient lies between -0.3 to -0.1 or 0.1 to 3.
The given correlation coefficient :-0.898
Since, it lies between -1 and -0.5 and has negative sign, it means it indicates a strong negative between the two things.
<span>Using the counting principle, the total number of possible telephone numbers is given by
N = 1 * 1 * 9 * 10 * 10 * 10 * 10 * 10 * 10 = 9,000,000</span>
