Answer:
21, 144, 12
Step-by-step explanation:
Given that a sample of 30 distance scores measured in yards has a mean of 7, a variance of 16, and a standard deviation of 4.
Let X be the distance in yard.
i.e. each entry of x is multiplied by 3.
New mean variance std devition would be
E(3x) =
Var (3x) =
Std dev (3x) =
Thus we find mean and std devition get multiplied by 3, variance is multiplied by 9
Answer:
(4, 0)
Step-by-step explanation:
The circumference of a circle is where <em>r</em> is the radius.
In this case, . Divide both sides of the equation by
to get
The center of the circle is on the <em>x</em>-axis, so the intercepts are 5 units to the left of the center and 5 units to the right of the center. The two intercepts are (-1-5, 0) and (-1+5, 0). The point that is on the positive <em>x</em>-axis is (4, 0).
See attached image.
