Probability / Statistics

F
Hard question: x satisfies the equation 1 / ? =1 /2017^2 +1 / 2018^2 + ⋯ +1 / 4030^2; which of 2016, 2017, 3024, 4037 is closest to x?
Replies
4
Views
3K
Dr.Peterson
Dr.Peterson
A
Completely lost of the usage of Binomial Probability Distribution. (" Car color preferences change over the years...")
Replies
4
Views
488
Dr.Peterson
Dr.Peterson
A
Poisson distribution: Given mean = 3.1, X values 2,3,4,5,6; calculate what percent of data is for each of X-value
Replies
1
Views
291
BigBeachBanana
BigBeachBanana
L
A farmer brings produce to the farmer's market and records whether people buy lettuce, apples, both, or something else. Complete the table below
Replies
6
Views
695
lu346
L
L
Not sure how to do this problem: "Researchers at a media company want to study news-reading habits among different age groups."
Replies
3
Views
598
Dr.Peterson
Dr.Peterson
S
need help with calculating combinations and permutations
Replies
2
Views
293
Dr.Peterson
Dr.Peterson
E
When is a critical region necessary for hypothesis testing?
Replies
1
Views
353
BigBeachBanana
BigBeachBanana
K
Confidence interval question: I have a total of 3500 houses. I sampled 350 (10%) and found only 1 had a positive response....
Replies
1
Views
334
BigBeachBanana
BigBeachBanana
L
Probability of seeing 11:11
Replies
10
Views
11K
khansaheb
K
F
Help with Counting Problem 2.1: An exam has 15 questions: 8 true/false and 7 multiple choice.
Replies
3
Views
383
fabaldoni
F
J
Hopefully a simple probability question: I have 35 apples, 13 are red and 22 are green. I have to pick 17 with a blindfold on.
Replies
5
Views
510
Jammyd
J
A
Square distribution: Three points are randomly selected on a circle of radius R. They form an inscribed triangle with some area.
Replies
6
Views
607
AlexShev
A
M
Finding a marginal probability density (stuck at the integration)
Replies
3
Views
485
MathNugget
M
M
Calculating the mean of a sum of independent variables, with the same distribution, when the number of terms varies?
Replies
7
Views
1K
MathNugget
M
R
A fairly simple probability question ( I think)
Replies
2
Views
331
Rampuss
R
M
Percentiles - getting mixed results when trying to find the 10th and 90th percentiles
Replies
4
Views
441
mathy555
M
J
Correct way to report significant digits in measurements and their uncertainty (calculating stream density)
Replies
2
Views
380
Dr.Peterson
Dr.Peterson
8
APPROACH TO: What is the probability of a football game ending with a score of 14 - 0 ?
Replies
11
Views
924
850mph
8
A
Mean and s.d of normal distribution? (The time taken for a randomly chosen student to complete the test is...)
Replies
10
Views
785
blamocur
blamocur
R
Probability of winning race: Each racer runs 100 yards. Each racer rolls to run between 3 and 10 yards....
Replies
0
Views
200
rp405
R
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