Question 15 2 pts Can a low barometer reading be used to predict maximum wind sp
ID: 3371194 • Letter: Q
Question
Question 15 2 pts Can a low barometer reading be used to predict maximum wind speed of an approaching tropical cyclone? Let x be the lowest pressure (in millibars) as a cyclone approaches, and let y be the maximum wind speed (in miles per hour) of the cyclone. Suppose a random sample of cyclones gave the following information. Given the scatter diagram and "best fit" line for the data below, would you say the correlation is low, moderate, or strong? Positive or negative? O low and negative strong and positive O moderate and negative O moderate and positive Olow and positive
Explanation / Answer
from the scatter diagram and best fitted line we can see there is a downward sloping straight line , or we may say there exists Negetive Slope. So it is very clear that there exists a negetive correlation(by negetive correlation we mean when value of one variable increases, the value of other decreases , and vice versa) betweem x and y.
And from the "best fit line " we can say a moderate downhill exists.
The strength of correlation coefficient (r) can be classified as:
A) exactly (-1) : A perfect downhill(negetive) linear relationship.
B) around (-0.7) : A strong downhill(negetive) linear relationship.
C) around ( -0.5 ): A moderate downhill(negetive) linear relationship.
D) around (-0.3) : A weak downhill(negetive) linear relationship.
E) exactly 0 : No linear relationship.
F) around (+0.3) : A weak uphill(positive) linear relationship.
G) around (+0.5) : A moderate uphill(positive) linear relationship.
H) around (+0.7) : A strong uphill(positive) linear relationship.
I) exactly (+1) : A perfect uphill(positive) linear relationship.
hence the answer will be moderate and negetive.