Calculate the standard deviation σ of X for the probability distribution. (Round your answer to two...

Question

Question

Calculate the standard deviation σ of X for the probability distribution. (Round your answer to two decimal places.)
σ =

x	−20	−10	0	10	20	30
P(X = x)	0.1	0.2	0.4	0.1	0	0.2

math Statistics-And-Probability

Answer 1

Answer #1

Answer 2

Similar Homework Help Questions

Let X have a normal distribution with mean µ = 30 and standard deviation σ =...

Let X have a normal distribution with mean µ = 30 and standard deviation σ = 10. Calculate P(X > 40), and round your answer to two decimal places.
a. Consider a normal distribution with mean 20 and standard deviation 4. What is the probability...

a. Consider a normal distribution with mean 20 and standard deviation 4. What is the probability a value selected at random from this distribution is greater than 20? (Round your answer to two decimal places. b. Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 14.3; σ = 3.5 P(10 ≤ x ≤ 26) = c. Assume that x has a normal...
Consider a normal distribution with mean 25 and standard deviation 5. What is the probability a...

Consider a normal distribution with mean 25 and standard deviation 5. What is the probability a value selected at random from this distribution is greater than 25? (Round your answer to two decimal places.) Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 14.9; σ = 3.5 P(10 ≤ x ≤ 26) = Need Help? Read It Assume that x has a...

The random variable X has the probability distribution table shown below. Calculate the standard deviation of...

The random variable X has the probability distribution table shown below. Calculate the standard deviation of X. Show all work as to how you performed your calculations as if you did not have a calculator. (Rounded to two decimal place [6 points) [Hint: First, find E(X)] * 0136 P(X = x) 0.1 0.2 0.3 0.4
A stock's return has the following distribution:Calculate the standard deviation. Round your answer to two decimal...

A stock's return has the following distribution:Calculate the standard deviation. Round your answer to two decimal places. Demand for the Company's Products Probability of This Demand Occurring Rate of Return if This Demand Occurs (%) Weak 0.1 -50% Below average 0.2 -9 Average 0.4 18 Above average 0.2 30 Strong 0.1 50 1.0
Assume that x has a normal distribution with the specified mean and standard deviation. Find the...

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 8; σ = 2 P(7 ≤ x ≤ 11) = Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 6.0; σ = 1.4 P(7 ≤ x ≤ 9) = Assume that x has a normal...

Find the mean and standard deviation of the given probability distribution. Round your answers to 2...

Find the mean and standard deviation of the given probability distribution. Round your answers to 2 places after the decimal point, if necessary. x P (x) 0 0.05 3 0.27 4 0.3 6 0.2 7 0.18 Mean = Standard deviation =
QUESTION 8 Find the standard deviation of the following discrete probability distribution. Round off to three...

QUESTION 8 Find the standard deviation of the following discrete probability distribution. Round off to three decimal places. A = 0.45 X P(x) 0 A 10.4 21-A QUESTION 8 Find the standard deviation of the following discrete probability distribution. Round off to three decimal places. A = 0.45 X P(x) 0 A 0.4 2 1-A 1
Need fast answer Examination in probability theory and statistics Variant 19 I. Discrete distribution for X...

Need fast answer Examination in probability theory and statistics Variant 19 I. Discrete distribution for X is given by the following table: Probability p Value X Find distribution function f0) and median Me@0. Calculate mathematical expectation (the mean) M(), variance (dispersion) DA), standard error σ(X), asymmetry coefficient As(X) and excess Ex(X). 0.3 10 0.4 20 0.2 30 0.1 40

X has a normal distribution with the given mean and standard deviation. Find the indicated probability....

X has a normal distribution with the given mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 36, σ = 20, find P(35 ≤ X ≤ 48)