You look at what the question says carefully and then you put that into the answer
Answer:
So the value of the test statistic is -0.85.
Step-by-step explanation:
We know that a sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 54% of the chips do not fail in the first 1000 hours of their use.
We get that:
We calculate the standar deviation:
We calculate the value of the test statistic:
So the value of the test statistic is -0.85.
100%/x%=80/20
(100/x)*x=(80/20)*x - we multiply both sides of the equation by x
100=4*x - we divide both sides of the equation by (4) to get x
100/4=x
25=x
x=25
Answer:
3.14 km
Step-by-step explanation:
we know that area of a circle is πr², where r is the radius
if here radius is 1 kilometres, π is 3.14
then, circle's area = 3.14 * 1 * 1 = 3.14 km
Volume of pyramid = 1/3 * 52900 * 138 = 2,433,400 Area of a pyramid is 1/3 * Area of base * height.
From the given pyramid, Area of square base = s^2 = 230^2 = 52900 and the height is 138 meters.
Volume of pyramid = 1/3 * 52900 * 138 = 2,433,400 m^3
hoped this helped