Answer:
a) 0.85
b) 0.0160
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean and standard deviation , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean and standard deviation .
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
For a proportion p in a saple of size n, the mean of the sampling distribution of sample means is p and the standard deviation is
In this problem, we have that:
(a) Calculate the mean of the sampling distribution of the sample proportion.
By the Central Limit Theorem, 0.85
(b) Calculate the standard deviation of the sampling distribution of the sample proportion. (Round your answer to four decimal places.)
Answer:
i need help to
Step-by-step explanation:
lol
Another way to figure the cost is $2.50 plus $0.50 per hour.
For 8 hours, the cost is $2.50 +8*$0.50 = $6.50.
Answer:
Step-by-step explanation:
The given triangle is a right angle triangle.
The distance between the first bed and the bird watcher on the ground represents the opposite side of the right angle triangle.
The distance between the birdwatcher and the second bird is 47 feet. This represents the hypotenuse of the right angle triangle. To determine the angle of depression, x degrees, we would apply the Sine trigonometric ratio which is expressed as
Sin θ = opposite side/hypotenuse
Sin x = 34/47 = 0.723
x = Sin^-1(0.723)
x = 46.3 degrees to the nearest tenth.
Answer: triangle DEF is similar
Step-by-step explanation: .9 * 5 = 4.5 1.5 * 5 = 7.5 so the triangle is five time bigger