Let x be a random variable representing dividend yield of bank stocks. we may assume that x has a normal distribution with σ = 2.9%. a random sample of 10 bank stocks gave the following yields (in percents).

5.7 4.8 6.0 4.9 4.0 3.4 6.5 7.1 5.3 6.1
the sample mean is x bar = 5.38%. suppose that for the entire stock market, the mean dividend yield is μ = 4.3%. do these data indicate that the dividend yield of all bank stocks is higher than 4.3%? use α = 0.01.

(a) what is the level of significance?

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi

answer4 to the second power is 16

and 4 to the third power is 64,