STATISTICS

a)    Definitions of dependable and undependable variables.Finding regression coefficient

In order to find the linear correlation coefficient for the values in the above question, the following equation is used

Estimated standard of error regression (slope)

 The linear correlation coefficient (r) shows that there is a relationship between weekly rent to that of apartment size while the evidence shown from the calculations in c above show that there is no linear relationship between apartment size and weekly rent. 

a)    Since we are not provided with the standard deviation, we must find it in order to carry on with this question.

a)    From the information given, standard deviation (σ) = 0.05, random sample (n) = 100, and a mean (x) of 1.99. Since the standard deviation did not come from the sample, this becomes a Z-test.

The null and alternatives then become: 

a)    The probability that a share fund lost 18%

Event A₁. 10% share fund loss.

Event A₂. 18% share fund loss.

Event B. 8% standard deviation