Question

For a group containing 100 observations, the arithmetic mean and standard deviation are 8 and 3.24. For 50 observation selected from these 100 observations the mean and S.D. are 10 and 2 respectively. Find the mean and standard deviation of the second half. (2)

Answer 1

Answer:

Polygon Exterior Angle Sum Theorem

If a polygon is convex, then the sum of the measures of the exterior angles, one at each vertex, is 360° .

Consider the sum of the measures of the exterior angles for an n -gon.

N=180n−180(n−2)

Distribute 180 .

N=180n−180n+360 =360.

Step-by-step explanation:

Polygon Exterior Angle Sum Theorem

If a polygon is convex, then the sum of the measures of the exterior angles, one at each vertex, is 360° .

Consider the sum of the measures of the exterior angles for an n -gon.

N=180n−180(n−2)

Distribute 180 .

N=180n−180n+360 =360.