Many birds are injured or killed by flying into windows. it appears that birds don't see windows. can tilting windows down so that they reflect earth rather than sky reduce bird strikes? place six windows at the edge of a woods: two vertical, two tilted 20 degrees, and two tilted 40 degrees. during the next four months, there were 53 bird strikes, 31 on the vertical window, 14 on the 20-degree window, and 8 on the 40-degree window. if the tilt has no effect, we expect strikes on all three windows to have equal probability.

the p-value for the test is,
a) 0.01 < p < 0.02.
b) 0.0025 < p < 0.001.
c) p < 0.005.
d) 0.0005 < p < 0.001.

Then null hypothesis is reject and there will be effect

Step-by-step explanation:

After some calculation we have find the value of distribution such as follow

n=53

(O-E)^2 /E=23.2699

to calculate the subtotal let take Chi - square

as chi-square = 23.3699

then Df = 3-1 = 2

P<0.0005

if P - value is less than the significance level then reject null hypothesis

p<0.001

then null hypothesis is reject and there will be effect

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.