Probability And Statistical Inference (10th Edition)
10th Edition
ISBN: 9780135189399
Author: Robert V. Hogg, Elliot Tanis, Dale Zimmerman
Publisher: PEARSON
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Chapter 1.3, Problem 16E
Bowl A contains three red and two white chips, and bowl B contains four red and three white chips. A chip is drawn at random from bowl A and transferred to bowl B. Compute the
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5 of 5
(i) Let a discrete sample space be given by
Ω = {ω1, 2, 3, 4},
Total marks 12
and let a probability measure P on be given by
P(w1) 0.2, P(w2) = 0.2, P(w3) = 0.5, P(w4) = 0.1.
=
Consider the random variables X1, X2 → R defined by
X₁(w3) = 1, X₁(4) = 1,
X₁(w₁) = 1, X₁(w2) = 2,
X2(w1) = 2, X2(w2) = 2, X2(W3) = 1, X2(w4) = 2.
Find the joint distribution of X1, X2.
(ii)
[4 Marks]
Let Y, Z be random variables on a probability space (N, F, P).
Let the random vector (Y, Z) take on values in the set [0,1] × [0,2] and let the
joint distribution of Y, Z on [0,1] × [0,2] be given by
1
dPy,z(y, z)
(y²z + y²²) dy dz.
Find the distribution Py of the random variable Y.
[8 Marks]
Total marks 16
5.
Let (,,P) be a probability space and let X : → R be a random
variable whose probability density function is given by f(x) = }}|x|e¯|×| for
x Є R.
(i)
(ii)
Find the characteristic function of the random variable X.
[8 Marks]
Using the result of (i), calculate the first two moments of the
random variable X, i.e., E(X") for n = 1, 2.
(iii) What is the variance of X?
[6 Marks]
[2 Marks]
Total marks 16
5.
Let (N,F,P) be a probability space and let X : N → R be a
random variable such that the probability density function is given by
f(x)=ex for x € R.
(i)
Find the characteristic function of the random variable X.
[8 Marks]
(ii) Using the result of (i), calculate the first two moments of
the random variable X, i.e., E(X") for n = 1,2.
(iii)
What is the variance of X.
[6 Marks]
[2 Marks]
Chapter 1 Solutions
Probability And Statistical Inference (10th Edition)
Ch. 1.1 - Of a group of patients having injuries, 28% visit...Ch. 1.1 - An insurance company looks at its auto insurance...Ch. 1.1 - Draw one card at random from a standard deck of...Ch. 1.1 - A fair coin is tossed four times, and the sequence...Ch. 1.1 - Consider the trial on which a 3 is first observed...Ch. 1.1 - If P(A)=0.5,P(B)=0.6, and P(AB)=0.4, find (a)...Ch. 1.1 - Given that P(AB)=0.76 and P(AB)=0.87, find P(A).Ch. 1.1 - During a visit to a primary care physicians...Ch. 1.1 - Roll a fair six-sided die three times. Let...Ch. 1.1 - Prove Theorem 1.1-6.
Ch. 1.1 - A typical roulette wheel used in a casino has 38...Ch. 1.1 - Let x equal a number that is selected randomly...Ch. 1.1 - Divide a line segment into two parts by selecting...Ch. 1.1 - Let the interval [r,r] be the base of a...Ch. 1.1 - Let S=A1A2...Am, where events A1,A2,...,Am are...Ch. 1.1 - Let pn,n=0,1,2..., be the probability that an...Ch. 1.2 - A combination lock was left at a fitness center....Ch. 1.2 - In designing an experiment, the researcher can...Ch. 1.2 - How many different license plates are possible if...Ch. 1.2 - The eating club is hosting a make-your-own sun-dae...Ch. 1.2 - How many four-letter code words are possible using...Ch. 1.2 - Suppose that Novak Djokovic and Roger Federer are...Ch. 1.2 - In a state lottery, four digits are drawn at...Ch. 1.2 - How many different varieties of pizza can be made...Ch. 1.2 - The World Series in baseball continues until...Ch. 1.2 - Pascals triangle gives a method for calculating...Ch. 1.2 - Three students (S) and six faculty members (F) are...Ch. 1.2 - Prove: r=0n(1)r(nr)=0andr=0n(nr)=2n HINT: Consider...Ch. 1.2 - A bridge hand is found by taking 13 cards at...Ch. 1.2 - At the end of a semester, 29 students in a...Ch. 1.2 - Prove Equation 1.2-2. HINT: First selectn1...Ch. 1.2 - A box of candy hearts contains 52 hearts, of which...Ch. 1.2 - A poker hand is defined as drawing five cards at...Ch. 1.2 - For each positive integer n, let P({n})=(12)n....Ch. 1.3 - A common screening test for 1-IIV is called the...Ch. 1.3 - The following table classifies 1456 people by...Ch. 1.3 - Let A1 and A2 be the events that a person is left-...Ch. 1.3 - Two cards are drawn successively and without...Ch. 1.3 - Suppose that the gene for eye color for a certain...Ch. 1.3 - A researcher finds that, of 982 men who died in...Ch. 1.3 - An urn contains four colored halls: two orange and...Ch. 1.3 - An urn contains 17 balls marked LOSE and three...Ch. 1.3 - An urn contains four balls numbered 1 through 4....Ch. 1.3 - A single card is drawn at random from each of six...Ch. 1.3 - Consider the birthdays of the students in a class...Ch. 1.3 - You are a member of a class of 18 students. A bowl...Ch. 1.3 - In the gambling game craps. two dice are rolled...Ch. 1.3 - Some albatrosses return to the worlds only...Ch. 1.3 - An urn contains eight red and seven blue balls. A...Ch. 1.3 - Bowl A contains three red and two white chips, and...Ch. 1.4 - Let A and B be independent events with P(A)=0.7...Ch. 1.4 - Let P(A)=0.3 and P(B)=0.6. (a) Find P(AB) when A...Ch. 1.4 - Let A and B be independent events with P(A)=14 and...Ch. 1.4 - Prove parts (b) and (c) of Theorem 1.4-1.Ch. 1.4 - If P(A)=0.8,P(B)=0.5, and P(AB)=0.9, are A and B...Ch. 1.4 - Show that if A, B, and C are mutually independent,...Ch. 1.4 - Each of three football players will attempt to...Ch. 1.4 - Die A has orange on one face and blue on five...Ch. 1.4 - Suppose that A, B, and C are mutually independent...Ch. 1.4 - Let D1,D2,D3 be three four-sided dice whose sides...Ch. 1.4 - Let A and B be two events. (a) If the events A and...Ch. 1.4 - Flip an unbiased coin five independent times....Ch. 1.4 - An urn contains two red balls and four white...Ch. 1.4 - In Example 1.4-5, suppose that the probability of...Ch. 1.4 - An urn contains ten red and ten white balls. The...Ch. 1.4 - An urn contains five balls, one marked WIN and...Ch. 1.4 - Each of the 12 students in a class is given a fair...Ch. 1.4 - An eight-team single-elimination tournament is set...Ch. 1.4 - Extend Example 1.4-6 to an n-sided die. That is,...Ch. 1.4 - Hunters A and B shoot at a target with...Ch. 1.4 - There are eight major blood types, whose...Ch. 1.5 - Bowl B1 contains two white chips, bowl B2 contains...Ch. 1.5 - Bean seeds from supplier A have an 85% germination...Ch. 1.5 - A doctor is concerned about the relationship...Ch. 1.5 - Assume that an insurance company knows the...Ch. 1.5 - At a hospitals emergency room, patients are...Ch. 1.5 - A life insurance company issues standard,...Ch. 1.5 - A chemist wishes to detect an impurity in a...Ch. 1.5 - A store sells four brands of tablets. The least...Ch. 1.5 - There is a new diagnostic test for a disease that...Ch. 1.5 - Prob. 10ECh. 1.5 - At the beginning of a certain study of a group of...Ch. 1.5 - Two processes of a company produce rolls of...Ch. 1.5 - A hospital receives 40% of its flu vaccine from...
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