A biased die is thrown thirty times and the number sixes seen is eight. If the dieis thrown a further twelve times find the expected numbers of sixes and thevariance of the number of sixes. *E(X)=3.1 and Var.=2.346None of the choicesE(X)=3.2 and Var.=2.346E(X)=3.2 and Var.=2.347

List of formulae : Expected value : E(X) = np Variance : Var(X) = np(1-p)

Answered: A biased die is thrown thirty times and…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

We have a random variable Y with unknown mean value. We have obtained a random sample of 10 values of the random variable. The values of the sample are given as: Y = 4, 6, 6, 9, 7, 8, 6, 9, 8, 9. Give the estimate of the mean value of Y.
None
When a random variable X follows binomial distribution, the probability of success on one trian is equal to 0.8, and the number of trials is eual to 125, What is the variance of X ?
Consider two independent random variables X and Y with Means of 17 and 21. Assume the variance for the first variable is 1 and that for second variable is 2. Define a new variable as: 3 *X + 4*Y 3*X- 4*Y Calculate the new mean and variance for each case.
Suppose the number of off springs a female eagle raises during its lifetime has a distribution with mean 18 and variance 4. In an area, 45 rescued and cured female eagles are set free. If these eagles are assumed to be independent (no lack of male partners and food resources), the total number of off-springs produced by these eagles can be assumed to have a Normal distribution with mean and variance pus NEXT Save
please be clear
From the data set of a class, a student taking a final exam is random variable with mean equal to 50 and variance is 25. Find an upper bound for the student probability that a student's exam score will between 40 and 60.
please show steps neatly with answer.
Yoonie is a personnel manager in a large corporation. Each month she must review 16 of the employees. From past experience, she has found that the reviews take her approximately four hours each to do with a population standard deviation of 1.2 hours. Let Χ be the random variable representing the time it takes her to complete one review. Assume Χ is normally distributed. Let x¯x¯ be the random variable representing the mean time to complete the 16 reviews. Assume that the 16 reviews represent a random set of reviews. What causes the probabilities in Exercise 7.3 and Exercise 7.4 to be different?
Suppose that X1, X2, X3 and X4 are all independent random variables, each with a normal distribution with mean 9 and variance 25. Define X-bar = (X1 + X2 + X3 + X4) / 4. Find Prob(X-bar > 10).
The average growth of a certain kind of tree is 1.63 inches in three years. A biologist claims that a new kind will have greater three-year growth. A random sample of 25 of the new variety has an average three-year growth of 3.56 inches and a variance of 11.77 inches. The test statistic is: (write only the number in the blank round it to 4 decimal points if needed) Answer: Next page
Previous Probletn Let X and Y be independent random variables. Suppose X has variance 2 and let Y have variance 5. Find Var(3X-2Y + 3). Please answer to 2 decimal places.

SEE MORE QUESTIONS

Recommended textbooks for you

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

SEE MORE TEXTBOOKS

A biased die is thrown thirty times and the number sixes seen is eight. If the die is thrown a further twelve times find the expected numbers of sixes and the variance of the number of sixes. * E(X)=3.1 and Var.=2.346 O None of the choices O E(X)=3.2 and Var.=2.346 E(X)=3.2 and Var.=2.347