Answer:
Step-by-step explanation:
(a) R2 does not determine the level of correlation between two variables in statistics but rather it is used to determine the level of variance in a dependent variable that is explained by an independent variable. It is also known as coefficient of determination.
Pearson's correlation coefficient (r) will better explain a direct relationship between a country's literacy rate and life expectancy and the value obtained will better explain option a
(b) The slope of the line can predict an improvement in life expectancy but cannot guarantee this improvement. And as such, the use of the word "will" suggests a form of guarantee which is wrong in interpreting slopes.
Answer:
d) $26.01
Step-by-step explanation:
7.5% is 0.075
0.0765(8.50×40)
26.01
Answer:
21
Step-by-step explanation:
3 x 2 + 15
Answer:
Step-by-step explanation:
i assume that you mean
log X (25) = 7
which would be:
x power by 7 = 25, but it is wrong, so more clear questions please
To be a perfect square this condition must be applied b^2 -4ac>=0
where a is coefficient of x^2 and b is coefficient of x and c is the last term
so in this equation
a=1 ; b = ? ; c= 81
b^2 -4ac >=0
b^2 -4(1)(81)>=0
b^2 >= 324
so b= 18
