Answer is (n + 3) + (n - 7)
Simplified to 2n - 4
Using “n” for number
Its Letter B -0.5
negative because its slope is negative (from left to right it's going downward)
so there are 2 negavite numbers in the choices, -0.5 and -0.95.
The nearer the value to 1 the less scatter it is. The farther the value to 1 (means nearer to 0) the more scatter it is. Because the plot in the picture is mostly scattered the value should be nearer to 0. It is negative 0.5.
Standard error (SE)
Or
Therefore, SE of the mean = (8)/(2) =4
