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Probability and Statistics
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Questions (4,622)
4. a) In a supermarket, the average arrival rate of customers is 10 every 30 minutes, following Poisson process. The average
1 answer
asked by
vikash
159 views
Thirty percent of the students in a high school face a disciplinary action of some kind before they graduate. Of those students,
7 answers
asked by
hello
5,364 views
For each one of the following situations, state whether a Poisson model is a plausible model over the specified time frame.
The
4 answers
asked by
Jia
3,682 views
theoretically if you roll a number cube 36 times, how many times would you expect to roll the number one? could you also give me
7 answers
asked by
David
8,417 views
a coin is tossed and a die is thrown. what is the probability of getting a head and a perfect square?
12 answers
asked by
peace
4,966 views
Calculate the expected value of the number of cups of coffee Alex drinks each day
1 answer
asked anonymously
79 views
In a company there are 7 executives: 4 women and 3 men. 3 are selected to attend a management seminar. Find these probabilities.
5 answers
asked by
Reuben Musundi
5,611 views
On a certain road 20% of the vehicles are trucks, 16% are buses and the remainder are cars.
(i) A random sample of 11 vehicles is
5 answers
asked by
Josh
5,209 views
Suppose that we have three engines, which we turn on at time 0. Each engine will eventually fail, and we model each engine's
7 answers
asked by
Anonymous
4,202 views
A dice game involves rolling 2 dice. If you roll a 2, 3, 4, 10, 11, or a 12 you win $5. If you roll a 5, 6, 7, 8, or 9 you lose
5 answers
asked by
Rosmery
10,211 views
You are given the set of letters ( A, B, C, D, E ). What is the probability that in a random five-letter string (in which each
5 answers
asked by
qwerty
5,044 views
Helen has some black tiles, some white tiles and some grey tiles. She places a single row of
8 tiles above her washbasin. Each
4 answers
asked by
Raj
2,807 views
Use the spinner to simulate the random selection of two letters with repetition from the word CLEAN. This will constitute one
2 answers
asked anonymously
179 views
outcomes : 2, 4, 6, 8, 10, 12
Frequency : 10, 9, 6, 15, 13, 8 Jede tossed a cube with faces numbered with 2, 4, 6, 8, 10, and 12.
2 answers
asked by
Koiiiii
242 views
By the argument in the last video, if the Xi are i.i.d. with mean μ and variance σ2 , and if Mn=(X1+⋯+Xn)/n , then we have
5 answers
asked by
SK
2,875 views
If the table below represents a probability model based on observed frequencies, what is the value of x?
Y C A R E S P(Y) 0.25
6 answers
asked by
just living :>
612 views
If 8% of the population of trees are elm trees, find the probability that in a sample in a sample of 100 trees, there are
6 answers
asked by
Michelle
4,210 views
The numbers of cookies in a shipment of bags are normally distributed, with a mean of 64 and a standard deviation of 4. What
7 answers
asked by
Skye
8,160 views
3 letters are typed, with repetition allowed. What is the probability that all 3 will be vowels? Write your answer as a percent.
5 answers
asked by
Berta
5,326 views
A die is tossed. Find the odds against rolling a number greater than 2
The odds against rolling a number greater than 2 are __ :
4 answers
asked by
Beth
13,086 views
A money envelope contains five $10 bills, ten $20 bills, and fifteen $50 bills. Sandra randomly selects two bills without
3 answers
asked anonymously
213 views
Cross out the part of the concept circle that does not belong. Then describe the relationship among the remaining parts. a coin
1 answer
asked anonymously
140 views
A bag contains 4 white, 3 blue, and 5 red marbles.
1. Find the probability of choosing a red marble, then a white marble if the
66 answers
asked by
jjiiddss
25,469 views
in a shipment of 20 computers, 3 are defective
three computers are randomly selected and tested. what is the probability that all
5 answers
asked by
Sara!
7,472 views
1.
You flip a coin 30 times and get heads 11 times, so the chance of getting heads is eleven over thirty . Is this an example of
82 answers
asked by
Delilah
29,227 views
Bonita bought her mom a charm bracelet. Each charm is labeled with a one-word message.
What is the probability that the 5 charms
3 answers
asked by
nfngs
994 views
A number cube is rolled 100 times. The results are shown in the table below.
Outcome: 1, 2, 3, 4, 5, 6. Number of times rolled:
22 answers
asked by
Help! pls
7,085 views
Which of the following statements is true about the t-distribution with k degrees of freedom?
i. the t-distribution is symmetric
4 answers
asked by
Anonymous
9,400 views
Bowls A and B contain a number of white and red balls. Clark repeatedly selected a ball from both bowls and recorded the results
3 answers
asked by
Yo mama
860 views
2. Based on the experimental probability predict the number of times you will roll a 5 if you roll the number cube 300 times.
15�
28 answers
asked by
Brasil
4,117 views
A deck from a card game is made up of about 108 cards. Twenty-five of them are red, yellow, blue, and green, and eight are wild
6 answers
asked by
Jackie
5,050 views
Michael is playing tournament chess against a computer program and the probability he wins against the program at any given game
4 answers
asked by
zxz
1,134 views
A math class contains 7 females (three of whom speak French and the rest speak only English),and 12 males (two of whom speak
5 answers
asked by
jennifer
5,317 views
Bowls A and B contain a number of white and red balls. Clark repeatedly selected a ball from both bowls and recorded the results
2 answers
asked by
:)
290 views
A basket of fruits contains 5 bananas, 8 mangoes, and 7 apples. Two fruits are randomly selected without replacement. Calculate
3 answers
asked by
Cheezet
386 views
A newly-opened restaurant has 5 menu items. If the first 4 customers each choose one menu item uniformly at random, the
6 answers
asked by
anonymous
3,715 views
Two identical biased coins are tossed together, and the outcome is recorded. After a large number of trials it is observed that
4 answers
asked by
Harry
1,409 views
Four persons are chosen at random from a group of 10 persons consisting of 4 men and 6
women. Three of the women are sisters.
4 answers
asked by
Kj
1,753 views
if the bowl contains 5 red marbles 7 blue marbles and 8 white marbles what is the probability you will draw a red or blue
6 answers
asked by
Maria
2,197 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
2,825 views
A bowl contains 3 red balls, 2 blue balls and 5 white balls. A ball is selected and the color noted. Then it is replaced. A
7 answers
asked by
Maryan
8,440 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
5,697 views
Suppose a box of marbles contains equal numbers of red marbles and yellow marbles but twice as many green marbles as red
4 answers
asked by
Gayle
1,591 views
You are interested in the number of chocolate chips on a cookie. To estimate this number, you consider two different
3 answers
asked by
Joseph
1,052 views
a) In a supermarket, the average arrival rate of customers is 10 every 30 minutes, following Poisson process. The average time
1 answer
asked anonymously
147 views
A middle school has 450 students. In a random sample of 100 students, 8 students indicated that they have traveled outside the
1 answer
asked anonymously
92 views
A letter is to be randomly picked from the word MISSISSIPPI. Which set of letters have equal chances to be selected?
A- S and I
4 answers
asked by
just living :>
461 views
If the arrow is spun twice, what is the probability of getting
a, two 3s b, two 4s c,a 1 followed by a 2 d,a 4 followed by a 3
2 answers
asked by
peter
92 views
The life time of a certain kind of batteries has a mean life of 400 hours and standard deviation as 45 hours. Assuming the
4 answers
asked by
Kruti
2,662 views
et X and Y be independent Erlang random variables with common parameter λ and of order m and n, respectively. Is the random
4 answers
asked by
David
1,343 views
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