It is known that 68% of Whos in Whoville support a constitutional amendment banning selfies on social media. The Grinch surveys a sample of 400 Whos, at random with replacement. Suppose that p is the sample proportion of Whos who support banning selfies on social media. Required:
a. The expected value of p is =
b. The standard error of p is =

The sum of the angles in a triangle is 180°. this is called the angle-sum property.the sum of the lengths of any two sides of a triangle is greater than the length of the third side. similarly, the difference between the lengths of any two sides of a triangle is less than the length of the third side.the side opposite to the largest angle is the longest side of the triangle and the side opposite to the smallest angle is the shortest side of the triangle.

M< abc = 45° and m< cbd= 45°