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Basic Probability and Statistics

Basic Probability, Statistics, and Combinatorics
Ackbach
  • Sticky
Extremely Important Article on Statistics
Replies
1
Views
8K
Joppy
J
J
Probability: Find the number of ways to form 4-digit numbers >3000
Replies
4
Views
330
Joe_1234
J
Dhamnekar Winod
Expected value and equality to sums
Replies
4
Views
149
Dhamnekar Winod
Dhamnekar Winod
H
What is the probability that at least 5 was shown for 5 or more times?
Replies
4
Views
73
MarkFL
MarkFL
karush
Expected value for the total number of points awarded on any toss of coins
Replies
6
Views
274
karush
karush
karush
find probability it will rain both days
Replies
3
Views
83
HallsofIvy
H
I
Probability distribution: Estimate the size of the fox population
Replies
2
Views
46
Istar
I
I
In how many ways can Ben paint his apartment?
Replies
4
Views
87
Istar
I
I
Discrete Probability: What is the expected value of cup of coffee to the customer
Replies
5
Views
68
MarkFL
MarkFL
C
What is the probability that exactly 8 of them are over the age of 65
Replies
1
Views
365
HallsofIvy
H
C
Find the probability of 1 tire with low air pressure P (1)
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0
Views
96
Crowbarr
C
H
Tom claims that there is over a 60% chance that you can win a 10 or 5 prize. Is his claim correct
Replies
1
Views
1K
HallsofIvy
H
M
possible combinations for six digit license plates, numbers 0-9 and letters a-z.
Replies
1
Views
4K
joypav
J
Monoxdifly
Find the number of ways of giving 31 cupcakes to 5 students each receives odd number of cupcakes to each one
Replies
3
Views
2K
Klaas van Aarsen
Klaas van Aarsen
Monoxdifly
the number of possible permutations for the assessment
Replies
2
Views
942
Monoxdifly
Monoxdifly
P
Dice throwing probabilities
Replies
8
Views
2K
Peterconfused
P
R
One is blindfolded to choose 11 socks randomly, find the probability of choosing 11 reds in a row
Replies
3
Views
5K
Gaffer
G
G
How many white balls in the container must be at least so that the probability that two black balls were drawn was < 23/30
Replies
2
Views
1K
ghostfirefox
G
Monoxdifly
[ASK] Probability of Getting the Main Doorprize
Replies
3
Views
2K
Monoxdifly
Monoxdifly
S
Probability calculation of dependent events with limitations
Replies
0
Views
886
Slyv3r
S
S
Confused About Mutual Exclusivity with More Than Two Events
Replies
13
Views
2K
Ackbach
Ackbach
L
Pricing (VAT)
Replies
1
Views
879
HallsofIvy
H
M
Find the probability all 5 dice rolls are the same
Replies
2
Views
1K
marcadams267
M
L
Probability of Having a Disease
Replies
1
Views
547
HallsofIvy
H
Monoxdifly
[ASK] A die is tossed 100 times. What's the expected frequency that the number appears will be 4
Replies
2
Views
1K
Monoxdifly
Monoxdifly
A
Probability of cancer because of microwaves
Replies
1
Views
581
HallsofIvy
H
M
help explaining unrounding concepts
Replies
3
Views
888
Klaas van Aarsen
Klaas van Aarsen
T
how many people will be in the top 10% in at least one examinations
Replies
2
Views
438
Tomacork
T
V
Number of ways to color a grid
Replies
0
Views
312
Viking
V
W
Which class has the greatest frequency and which has the least frequency
Replies
1
Views
1K
HallsofIvy
H
Z
Need to find the probability of receiving 8 pairs of identical boxes choosing from 8 items 16 times?
Replies
1
Views
640
HallsofIvy
H
K
Find the probability of AT LEAST three 6s occurring when rolling five six-sided dice all at onc
Replies
1
Views
2K
HallsofIvy
H
S
Using ratios to calculate weights in a weighted average (or not)
Replies
0
Views
1K
steveistumped
S
M
Boxplot question
Replies
1
Views
639
Jameson
Jameson
J
Find the probability where two throws are the same (a double) when throwing a 6-sided die 5 times
Replies
1
Views
2K
Opalg
Opalg
P
If he chooses randomly, how many ways can Akio form his starting lineup
Replies
1
Views
1K
MarkFL
MarkFL
F
What are the chances that someone in the shop during those two hours was a student who came in for office hours
Replies
2
Views
544
f666
F
S
Probability of a random subset of Z
Replies
1
Views
1K
Evgeny.Makarov
E
C
Conditional probability given 2 scenarios: probability of meeting male and a female in the shop
Replies
1
Views
2K
Country Boy
C
L
Levels of Measurement, Basic OLS Regression Questions
Replies
1
Views
885
lomaxbridges
L
R
null hypothesis and alternate hypotheses
Replies
1
Views
1K
Jameson
Jameson
J
How to exclude combinations for defined sequences?
Replies
1
Views
828
steep
S
T
Statistics Problem: Which class has the greatest frequency and which has the least frequency
Replies
1
Views
937
Klaas van Aarsen
Klaas van Aarsen
S
Statistics using pie chart: how many more students are there in biology compared to physics
Replies
3
Views
2K
topsquark
topsquark
T
Calculating the expected value and variance of continuous multi-variable function
Replies
1
Views
529
Country Boy
C
X
What would the probability be for the 11th flip to be the same as 10th flip
Replies
3
Views
744
xNICK
X
R
Two screws are inspected and the first is found to be good. What is the probability that the second is also good
Replies
2
Views
1K
Ram123
R
Dhamnekar Winod
Rule of sum and rule pf product: How many distinct sums are possible using from 1 to all of the 15 cards
Replies
3
Views
3K
Dhamnekar Winod
Dhamnekar Winod
Asawira Emaan
How many different arrangements can be formed of the word "equation" if all the vowels are to be kept together?
Replies
3
Views
1K
Country Boy
C
J
What’s the increased probability for a masters student given that there are 3 lottery attempts
Replies
2
Views
823
Jeny George
J
J
guessing a three digit pin code from an 8 key keypad
Replies
2
Views
1K
Jameson
Jameson
J
Calculating a weighted mean?
Replies
3
Views
1K
Greg
Greg
J
probability that whenever a single order is selected what is the probability that this probability is from restaurant A or C or
Replies
1
Views
1K
skeeter
skeeter
J
Finding the probability probability that 4 adults selected at random have health insurance
Replies
1
Views
314
Country Boy
C
S
Find the probability that in a random sample of 4 shots, he will miss the bullseye at least 3 times
Replies
1
Views
2K
Country Boy
C
S
Given probability density function find its cumulative distribution function
Replies
1
Views
3K
Evgeny.Makarov
E
D
The most basic of questions, sorry. Paper Rock Scissors
Replies
1
Views
792
Klaas van Aarsen
Klaas van Aarsen
A
The emission rate changes such that the probability of 0 or 1 emission in 4 seconds becomes 0.8. What is the new rate?
Replies
3
Views
1K
Klaas van Aarsen
Klaas van Aarsen
R
Is there statistically significant evidence against the manufacturer's claim ? Why or why not?
Replies
1
Views
791
Country Boy
C
R
What is the probability that students will be arranged in order from shortest to tallest?
Replies
1
Views
1K
Wilmer
W
R
If all of the delegates shake hands with one another, how many handshakes are exchanged?
Replies
1
Views
488
Country Boy
C
R
Linear Correlation
Replies
1
Views
1K
Klaas van Aarsen
Klaas van Aarsen
P
Calculation of probability with arithmetic mean of the sum of random variables
Replies
1
Views
1K
Klaas van Aarsen
Klaas van Aarsen
R
Likelihood of things happening on with regularity depending on initial probability
Replies
1
Views
731
Jameson
Jameson
J
Compare between the different approaches of forecasting and advise by return the one you suggest
Replies
5
Views
1K
Jason000000
J
C
trying to understand how to formulate null and alternative hypotheses
Replies
1
Views
1K
Wilmer
W
J
What is the probability that the ball was labeled
Replies
6
Views
827
Wilmer
W
R
What is the probability that she selects none of those containing errors
Replies
2
Views
1K
Country Boy
C
R
Find the probability that among 7 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduating
Replies
2
Views
1K
Country Boy
C
R
find the probability that all 7 witnesses would pick the same person.
Replies
2
Views
746
Wilmer
W
R
find P(at least 1 woman)
Replies
2
Views
3K
Country Boy
C
R
Find P(spade or face card or 3 or club)
Replies
4
Views
677
rainbow
R
R
How many ways can the captain arrage her schedule?
Replies
1
Views
563
MarkFL
MarkFL
C
Calculating total possible matching combinations remaining
Replies
0
Views
850
charles1234
C
M
[SOLVED] Expected value of steps
Replies
3
Views
1K
MATHias
M
S
Calculating overall percentage/probability from multiple categories?
Replies
3
Views
3K
Country Boy
C
A
  • Locked
Stats question on premiership goals
Replies
5
Views
2K
Greg
Greg
N
Pr of exactly one dice showing 2
Replies
9
Views
1K
Wilmer
W
L
Chance performance on a yes/no task where no is correct 2/3 of the time?
Replies
6
Views
2K
ltuff1
L
C
Find P(Q') B) P(Q union R) C) P(R')
Replies
2
Views
848
Country Boy
C
A
show that the probability that he will never stops gambling is zero
Replies
0
Views
574
Akea
A
T
Probability of winning dice game
Replies
3
Views
1K
Opalg
Opalg
C
Population formula part 1: Birth
Replies
2
Views
700
caters
C
N
How many different ways can these roles be filled if exactly one of Dale and Margaret gets a part?
Replies
1
Views
1K
tkhunny
T
A
Construct the 99% confidence interval estimate
Replies
1
Views
599
MarkFL
MarkFL
N
Find the probability that at least one mouse is a male given that exactly ones is grey.
Replies
2
Views
622
Country Boy
C
J
True or false
Replies
1
Views
495
Jameson
Jameson
C
What is the maximum death rate I should allow?
Replies
4
Views
524
tkhunny
T
M
How many times do we need to throw 2 dices to get more than 1/2 probability that at least once the sum of the two dices will be 12
Replies
5
Views
627
tkhunny
T
I
Significance test comparing slopes from linear fit
Replies
0
Views
368
iiwanovic
I
M
Bridge Game
Replies
1
Views
485
Greg
Greg
M
find the probability that each group has an equal amount of odd and even numbers
Replies
1
Views
434
Greg
Greg
N
What is the probability that he is having pizza?
Replies
1
Views
531
tkhunny
T
A
Variation of the shared birthday problem
Replies
1
Views
532
Ackbach
Ackbach
H
Probability of winning a point on serve in tennis
Replies
4
Views
1K
Hrant
H
M
what is the probability of a spin that results in an even number or a number less than 4
Replies
2
Views
691
MIIF
M
N
What is the probability of selecting two males given that both are grey?
Replies
2
Views
740
Country Boy
C
N
Conditional Probability and Venn Diagrams
Replies
2
Views
695
navi
N
N
Conditional Probability: Find the probability that the course he selects is in the afternoon.
Replies
2
Views
840
navi
N
Monoxdifly
[ASK] probability of that goalkeeper being able to fend off those penalty kicks 3 times
Replies
2
Views
819
Monoxdifly
Monoxdifly
N
How many ways can all the letters in the word ROCKET be arranged so that the vowels are always together?
Replies
3
Views
992
Jameson
Jameson
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