The table shows the average number of hours of daylight per day for the last four months of the year. what is the correlation coefficient for the data in the table?
month of 9 10 11 12
average hour of day light per ,37 11.37 10.57 10
a. -0.993
b. -0.791
c. 0.791
d. 0993

(A)

Step-by-step explanation:

For finding the correlation coefficient (r), we use the formula

r = \frac{n(\sum xy)-(\sum x\sum y)}{\sqrt{n\sum x^2-(\sum x)^2}\sqrt{n\sum y^2-(\sum y)^2}}

We take x as the month of year and y as the average hour of day light per day

n = 4

We have, ∑x = 42, ∑y = 44.37 ,∑xy = 461.3 ∑x^2 = 446, ∑y^2 = 494

r =

   = - 0.993 (approx)

step-by-step explanation:

i believe it is 0.1m because the measurement of 30.4m limits how precise you can be

you can only be as precise as the least precise measurement