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Probability and Statistics
Page 6
Questions (4,610)
If a person draws two cards from a standard deck (without replacing them), what is the probability that at least one of the
5 answers
asked by
brad
3,494 views
A cash prize of $5000 is to be awarded at a fundraiser. If 2,500 tickets are sold at $5 each, find the expected value if a
5 answers
asked by
mya
3,449 views
You have a spinner labeled 1-10, what are the odds of you getting a prime number?
4 answers
asked by
Anne st cyr
1,903 views
Albino rats used to study the hormonal regulation of metabolic pathway are injected with a drug that inhibits body synthesis of
4 answers
asked by
Lindz
3,437 views
A six-sided die has been tossed 4 times. How many sequences of these 4 outcomes contain at least one number greater than 4?
4 answers
asked by
picklepeter
1,463 views
7 girls audition for 12 roles in a school play. What is the probability that at least 2 of the girls audition for the same part?
6 answers
asked by
jenny
2,811 views
Standard Normanl Drill:
A. Find the number z such that the proportion of observations that are less than z in a standard Normal
5 answers
asked by
Devon
8,235 views
Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way
5 answers
asked by
Ashley
5,684 views
A single card is selected from an ordinary deck of cards. The sample space is shown in the following figure. Find the following
5 answers
asked by
Mike
4,516 views
A box contains five red, three blue, and two white poker chips. Two are selected without replacement. For example, BR is a
4 answers
asked by
Brandon
2,485 views
Assume that a researcher randomly selects 14 newborn babies and count the number of girls, X. The probabilities corresponding to
4 answers
asked by
Emily
2,178 views
The average age of chemical engineers is 37 years with a standard deviation of 4 years. If an engineering firm employs 25
4 answers
asked by
Anonymous
2,414 views
Suppose that the rejection region of a test ψ has the form R={Xn:Xn>c} . Find the smallest c such that ψ has level α .
(If
4 answers
asked by
ramj
1,231 views
high temperatures in a certain city for the of the month of august follow a uniform distribution over the interval 73 degreef to
4 answers
asked by
Anonymous
6,814 views
In its flip a lid contest, a coffee chain offers prizes of 50,000 free coffees, each worth $1.50; two new TVs, each worth $1200;
4 answers
asked by
Brandon
914 views
Elizabeth wants to use a standard number cube to do a simulation for a scenario that involves three equal outcomes. What is one
4 answers
asked by
Gabby
2,778 views
Suppose that 4 cards are drawn from a well-shuffled deck of 52 cards. What is the probability that all 4 are hearts?
There are 13
5 answers
asked by
Matt
5,120 views
I am stuck on several probability questions.
A spinner that has 15 equal sized sections numbered 1 to 15 is spun twice. What is
4 answers
asked by
Jack
2,277 views
Hello!!
A survey indicates that for each trip to the supermarket, a shopper spends an average of 45 minutes with a standard
4 answers
asked by
Anonymous
1,600 views
Students were surveyed to find out their favorite ice cream flavors. The results showed that 48% chose vanilla and 20% chose
3 answers
asked by
H
616 views
Each phone call by Ali consumes an amount of time that follows an exponential distribution with mean 5 minutes. The number of
23 answers
asked by
Alpha
3,442 views
In a large crowd,there are three times as many men as women.
Three people are chosen at random. Assuming there are so many people
3 answers
asked by
Esther
349 views
18. The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a standard deviation of 15. Given
4 answers
asked by
Steph
2,452 views
a)One game in a state lottery requires you to pick 1 heart, 1 club, 1 diamond, and 1 spade, in that order, from the 13 cards in
4 answers
asked by
Matthew
2,215 views
The water supply in a town depends entirely on two pumps. A and B. The probability of pump A filling is 0.1 and the probability
4 answers
asked by
kudu
1,178 views
The prior \lambda is distributed according to \textsf{Exp}(a) (a > 0). Write the probability distribution function \pi (\lambda
2 answers
asked anonymously
195 views
Kirk and Les regularly play each other at darts. The probability that Kirk wins any game is 0.3 and the outcome of each game is
2 answers
asked by
Anonymous
1,304 views
Determine a casino's expected net income from a 24-hour period at a single roulette table if the casino's total overhead for the
1 answer
asked by
CARMEN
1,001 views
The probability is 0.7 that a person shopping at a certain store spend less than $20.00. For groups size of 22, find the mean
1 answer
asked by
john
1,197 views
Pick a Card.
Mike and dave play the following card game. Mike picks a card from the deck If he selects a heart Dave gives him $5,
2 answers
asked by
Adie
869 views
Let k be a positive integer and let X be a continuous random variable that is uniformly distributed on [0,k]. For any number x,
2 answers
asked by
Ramya
188 views
a. Express P (x)= 1/6 ; for x = 1, 2, 3, 4, 5, 6, in distribution form.
b. Construct a histogram of the probability distribution
2 answers
asked by
Anonymous
520 views
In a Poisson distribution P(X=x) for x=0 is 10%. Find the (Log 102.3026.) mean and P(X<3),
1 answer
asked by
Rajesh
7 views
Compound Events Portfolio Worksheet
Directions: Use this worksheet to record your answers to the two Compound Events portfolio
3 answers
asked by
hi
51 views
Permutation(s) Combination(s) Example of _________ of two things from three total choices "a", "b", and "c" is "ab", "bc", "ca"
1 answer
asked anonymously
12 views
oddsnoun
the chances or likelihood that one thing will happen rather than another thing. I hope I will win the race, but the odds
1 answer
asked anonymously
6 views
Suppose that X and Y are described by a joint PDF which is uniform inside the unit circle, that is, the set of points that
9 answers
asked by
Anon
3,812 views
Question:A fair coin is flipped independently until the first Heads is observed. Let the random variable K be the number of
5 answers
asked by
Zozina
6,110 views
Consider n independent rolls of a k-sided fair die with k≥2: the sides of the die are labelled 1,2,…,k and each side has
5 answers
asked by
JuanPro
7,524 views
Let X be an exponential random variable and let Y=aX+b . The random variable Y is exponential if and only if (choose one of the
5 answers
asked by
luli
1,963 views
t the discrete random variable X be uniform on {0,1,2} and let the discrete random variable Y be uniform on {3,4}. Assume that X
7 answers
asked by
JuanPro
6,572 views
Let X be a non-negative random variable. Find the PDF of the random variable Y=lnX for each of the following cases:
For general
3 answers
asked by
navneethc
4,582 views
Every person has a random number of children, drawn from a common distribution with mean 3 and variance 2. The numbers of
4 answers
asked by
Muhammad
2,361 views
Let K be a discrete random variable that can take the values 1 , 2 , and 3 , all with equal probability. Suppose that X takes
5 answers
asked by
ANON
2,421 views
The bias of a coin (i.e., the probability of Heads) can take three possible values, 1/4 , 1/2 , or 3/4 , and is modeled as a
5 answers
asked by
Anil07
2,938 views
Consider the same stick-breaking problem as in the previous clip, and let l=1. Recall that fX,Y(x,y)=1/x when 0<=y<=x<=1.
a)
5 answers
asked by
maria
1,463 views
Of 500 employees of a firm 280 have a life insurance policy ,400 have a medical insurance cover and 200 participate in both
5 answers
asked by
Jackie
3,331 views
Amy immigrated to a new city, and would like to make friends with her new neighbours.
On any particular day i, she feels shy with
13 answers
asked by
Mona
3,750 views
Suppose that X has a PDF of the form
f(x) {1/x^2 if x>= 1 { 0 otherwise For any x>2, the conditional PDF of X, given the event
5 answers
asked by
Sam
4,220 views
Sophia is vacationing in Monte Carlo. On any given night, she takes X dollars to the casino and returns with Y dollars. The
6 answers
asked by
amar
7,343 views
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