The HR department of a big company, denoted E, wants to study the possible link between the daily number of absent employees and the morning temperature.
To do this, the head of the HR department randomly selected 120 days of activity and measured the two variables simultaneously. Using this dataset, the head of the HR department found an empirical linear correlation coefficient equal to -0.8932
Thus, one can deduce that: (only one answer)
a. The intensity of the linear relationship between the data of the two variables studied is rather very low.
b. The data of the two variables studied vary in the same direction.
c. The employees of the company represent the population concerned by this study.
d. The data allow us to confirm, with a risk 1%, that the two variables studied are not independent.
To do this, the head of the HR department randomly selected 120 days of activity and measured the two variables simultaneously. Using this dataset, the head of the HR department found an empirical linear correlation coefficient equal to -0.8932
Thus, one can deduce that: (only one answer)
a. The intensity of the linear relationship between the data of the two variables studied is rather very low.
b. The data of the two variables studied vary in the same direction.
c. The employees of the company represent the population concerned by this study.
d. The data allow us to confirm, with a risk 1%, that the two variables studied are not independent.
