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SK
Questions and answers by visitors named
SK
Questions (39)
Maximum likelihood estimation
The random variables X1,X2,…,Xn are continuous, independent, and distributed according to the
4 answers
1,906 views
CLT
Let Xn be i.i.d. random variables with mean zero and variance σ2. Let Sn=X1+⋯+Xn. Let Φ stand for the standard normal
4 answers
3,660 views
Estimator properties
We estimate the unknown mean θ of a random variable X (where X has a finite and positive variance) by
4 answers
3,900 views
How would you purify decanoic acid contaminated with biphenyl? what method and solvent.Please help me
2 answers
644 views
What is “institutional discrimination?” Give an example
4 answers
449 views
Having problems with less than/greater than decimals. Wanted to double check some answers.
a)0.5_1.0 My Answer is < b)3.2_3.02 My
6 answers
345 views
assume a pulley has a radius of 12.96 cm. If it takes 18 seconds for 56 cm of belt to go around the pulley, find the angular
4 answers
3,826 views
A ship leaves its homeport and sails on a bearing of N28degrees10'E. Another ship leaves the same port at the same time and
4 answers
2,852 views
A plane flies 1.3 hr at 100mph on a bearing of N40degreesE. It then turns and flies 1.5hr at the same speed on a bearing of
2 answers
812 views
The angle of depression from the top of the building to a point on the ground is 29degrees30', the point of the ground is 36
3 answers
1,409 views
the angle of depression from the top of a building to a point on the ground is 32degrees30', how far is the point of the ground
1 answer
492 views
find sin(s+t), given that sin t=1/3, t in quadrant 2, and cos s = -2/5, s in quadrant 3
2 answers
508 views
Find the value of tangent of angle A, given cos2A = 4/5, and A terminates in quadrant 2
3 answers
575 views
Use the double angle formula to verify the identity cotxsin2x=1+cos2x
3 answers
1,060 views
What is the final pressure gas sample that is subjected to a temperature change from 22.0 C to 30.0 C and a volume change from
1 answer
459 views
I honestly can't figure out how to draw this structure and it's especially difficult for online homework. I've used up 2 tries
1 answer
437 views
An electrician charges a customer $260 for 4 hours. He charges one customer $150 for 2 hours. How much does he charge for his
2 answers
500 views
What is the potential energy of an electron and proton in a hydrogen atom if the distance between them is 5.3*10^-11?
ANSWER
4 answers
2,758 views
1. How does chronic stress affect the reproductive system women?
2. How might chronic stress affect the healing of a broken bone?
3 answers
838 views
9. Write a paragraph about the asteroid theory of dinosaur extinction. Be sure to include any geological evidence.
2 answers
726 views
What is the probability that X and -Y sum to a negative value?
2 answers
3,069 views
For a given percentile range, what are the most ideal stock options to invest in for long-term growth?
2 answers
4,700 views
What is the conditional probability P(Heads|X=1/4)?
2 answers
2,840 views
Let X and Y be independent positive random variables. Let Z=X/Y . In what follows, all occurrences of x , y , z are assumed to
5 answers
4,778 views
Convergence in probability.
For each of the following sequences, determine whether it converges in probability to a constant. If
3 answers
2,944 views
Find the limits
Let Sn be the number of successes in n independent Bernoulli trials, where the probability of success at each
3 answers
1,629 views
The sample mean
Let X be a continuous random variable. We know that it takes values between 0 and 6, but we do not know its
3 answers
954 views
Airline overbooking
For any given flight, an airline tries to sell as many tickets as possible. Suppose that on average, 20% of
3 answers
1,315 views
Tossing a triple of coins
We have a red coin, for which P(Heads)=0.4, a green coin, for which P(Heads)=0.5, and a yellow coin,
3 answers
1,203 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
2,883 views
We saw that if we want to have a probability of at least 95% that the poll results are within 1 percentage point of the truth,
4 answers
2,858 views
CLT practice
The random variables Xi are i.i.d. with mean 2 and standard deviation equal to 3. Assume that the Xi are
4 answers
4,109 views
CLT for the binomial
Let X be binomial with parameters n=49 and p=1/10. The mean of X is: unanswered The standard deviation of X
5 answers
3,493 views
Bias and MSE
We estimate the unknown mean θ of a random variable X with unit variance by forming the sample mean
10 answers
4,864 views
Confidence interval interpretation
Every day, I try to estimate an unknown parameter using a fresh data set. I look at the data
4 answers
4,010 views
A simple CI
Let θ be an unknown parameter, and let X be uniform on the interval [θ−0.5,θ+0.5]. Is [X−2,X+2] an 80%
4 answers
asked by
SK
3,849 views
CI's via the CLT
The sample mean estimate Θˆ of the mean of a random variable with variance 1, based on 100 samples, happened
4 answers
3,031 views
Natural estimators
The random variables Xi are i.i.d. and satisfy E[X2i]=θ. Use a natural estimator to calculate an estimate of
5 answers
3,905 views
ML estimation
Let K be a Poisson random variable with parameter λ: its PMF is pK(k;λ)=λke−λk!,for k=0,1,2,…. What is the
4 answers
1,796 views
Answers (6)
37.70 In this question, we're going to go step by step to get the final price of the share. We know that the stock started off as $40 per share, so that would be our starting value. The stock dropped by 10%, so let's calculate the drop in price. 40 · 0.10
What do you mean?
I got 738
Is there an answer to this
Thank you. I never thought about looking at them like money.
Large atom goes on equatorial becasue equatorial is more stable than axial. You always want to have stable shape.