Q3. Random variable X takes value from 0 to 10 and follows a continuous uniform distribution such that $X sim ext{Unif}(0, 10)$ and the probability density function is $f(x) = frac{1}{10}, quad 0 < x < 10$. Answer the following questions. Q3-(a). [10 pts.] What's the mean ($mu$) and variance ($sigma^2$) of X? mean: , variance: (four decimal places) Q3-(b). [10 pts.] Compute a lower bound (minimum) of $P(mu - 1.5sigma < X < mu + 1.5sigma)$ using Chebyshev's Inequality. Compute the answer to four decimal places.
Added by Matthew P.
Close
Step 1
In this case, a = 0 and b = 10, so u = (0 + 10) / 2 = 5. The variance of a continuous uniform distribution is given by the formula: o2 = (b - a)^2 / 12. In this case, a = 0 and b = 10, so o2 = (10 - 0)^2 / 12 = 8.33 (rounded to two decimal places). Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 87 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Suppose X has a continuous uniform distribution over the interval [15, 30]. a) Determine mean, variance, and standard deviation of X. b) What is the probability density function? Write it in function notation, and also graph it. c) Find P(X < 4) d) Find P(X < 5).
David N.
Q(3) (a) A random sample of size 25 is drawn from a population whose probability density function is given by f(x) = { 1/4 e^(-1/4 x) for x > 0, 0 elsewhere. Find P( 3.04 < X̄ < 5.40 ) (Use Central Limit Theorem) Q(3)(b) Independent random samples of size n₁ = 20 and n₂ = 15 are taken from two normal populations having the means ̑₁ = 85 and ̑₂ = 80 and the variances ̑²₁ = 180 and ̑²₂ = 105. Find the following probabilities. (I) P [ (̑₁ - ̑₂ ) > 10.42 ] (II) P ( |(̑₁ - ̑₂ ) - 5 | < 6 ) (Use Chebyshev's theorem )
Adi S.
1. Suppose x is a random variable best described by a uniform probability distribution with c = 20 and d = 45 a. find f(x) b. Find the mean and standard deviation of x c. Graph f(x) and locate mean (u) and the interval u+ or - 2 sigma on the graph. Note that the probability that x assumes a value within the interval mean (u)+ or - 2sigma is equal to 1 2.Suppose x is a random variable best described by a uniform probability distribution with c = 3 and d = 7 a. find f(x) b. find the mean and standard deviation of x
Michael N.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD