finding x bar

An unfair coin has a 60% chance of landing heads-up. If X = 1 represents a coin landing heads-up, and X = 0 represents a coin landing tails-up, then find the sampling distribution of the mean( x ‾ ) for samples of size 3. => Figure 4 or Figu..

Find the coordinates of the midpoint of XY ‾ . The endpoints of XY ‾ are X(- 1, 8) and Y(7, -5). => (4 , 13 2 ) or (3 , 3 2 ) or ( 9 2 , 6 ) or (- 4 , - 13 2 )..

A curve is normally distributed with x ‾ = 30.6 and σ = 5.2 , find the area under the curve between 26.4 and 36.8 . => 0.2881 or 0.6730 or 0.3849 or 0.0968..

In the figure, C is the mid point of AB ‾ and D is the midpoint of CB ‾ . If AB ‾ = 36 inches and CD ‾ = 2 x + 1, then find the value of x . => 8 or 9 or 18 or 4..

If x is the length of MN ‾ which is the midsegment of ΔABC, then find the value of BC ‾ . => 2 x units or x units or 3 x units or 4 x units..

If AB ‾ is perpendicular to BD ‾ , find the values of x and y . => x = 50° and y = 30° or x = 50° and y = 40° or x = 40° and y = 40° or x = 40° and y = 45°..

In the given triangle if FG ‾ is midsegment of ΔAED and DE ‾ is the midsegment of ΔACB, then find the value of x . => 20 units or 25 units or 30 units or 15 units..

BDEC is an isosceles trapezoid. D is the midpoint of AB ‾ . If its perimeter is 23 cm, find the perimeter of Δ ABC. [Given x = 9.2 cm.] => 23 cm or 11.5 cm or 27.6 cm or 46 cm..

Find the length of the altitude BC ‾ of triangle ABC if x = 25 and y = 7. => 25 units or 48 units or 24 units or 7 units..

The standard deviation of the sampling distribution (σ x ‾ ) for a sample of n is 8.57, when the standard deviation of the target population is 21. Find the sample size. => 36 or 3 or 6 or 12..