Tag: sample

95 Locating freely available data samples 2010-07-19T19:15:59.303

30 What is the difference between a population and a sample? 2010-07-20T11:07:42.403

26 What if your random sample is clearly not representative? 2012-07-16T12:47:53.863

21 How do I figure out what kind of distribution represents this data on ping response times? 2010-08-05T19:26:34.060

12 Large sample asymptotic/theory - Why to care about? 2013-05-04T19:38:37.327

12 Is any quantitative property of the population a "parameter"? 2013-07-05T02:03:32.377

11 How to take many samples of 10 from a large list, without replacement overall 2010-10-31T14:09:43.783

11 What is the difference between sample variance and sampling variance? 2011-10-14T02:53:13.780

11 If not a Poisson, then what distribution is this? 2013-01-31T08:16:50.463

11 Bootstrap: the issue of overfitting 2014-08-16T19:37:27.403

10 Estimating the size of an intersection of multiple sets by using a sample of one set 2014-05-09T18:34:37.293

9 Calculating ratio of sample data used for model fitting/training and validation 2010-07-26T18:24:35.737

9 Does SurveyMonkey ignore the fact that you get a non-random sample? 2014-01-10T16:58:36.960

9 Why doesn't a sample proportion also have a binomial distribution 2015-06-15T04:29:07.417

9 Estimate variance of a population if population mean is known 2015-07-23T13:49:24.163

8 Subsample of a random sample: random sample? 2011-10-27T15:35:05.090

8 Consequences of exceeding sample size after determination of sample in power analysis 2016-01-06T09:11:57.183

7 How to define what a "sample" is? 2012-01-11T21:50:53.583

7 Small n: non-parametric or parametric tests? 2012-11-02T16:20:41.577

7 Consistency of sample quantile 2013-03-12T18:27:43.997

7 Generalizing results - what is the population? 2013-07-25T13:03:00.143

7 Non-random small sample - What conclusions can I get? 2013-09-27T15:30:29.880

7 Prove that distribution of sample median (for even sample) is symmetric 2014-01-29T21:34:51.823

7 Enlarging a random sample 2015-06-10T14:10:19.357

7 Are Kaggle competitions just won by chance? 2017-07-19T20:59:05.063

6 Are sample means for quantiles of sorted data unbiased estimators of the true means? 2012-07-28T01:06:09.467

6 Bounds for the population variance? 2013-02-13T15:28:46.187

6 Unbiased estimator from two SRS less duplicates 2013-03-04T21:08:58.303

6 Expected standard deviation for a sample from a uniform distribution? 2014-03-11T22:07:53.203

6 How to validate if a sample is independent and identically distributed 2014-12-26T17:31:18.897

6 Problems generating a sample from a custom distribution with log 2015-08-10T05:33:34.960

6 Sample mean and variance independence in the case of correlated observations 2016-01-25T19:57:00.957

6 When does one use $\frac{1}{\sqrt{n}}$ and when does one use $1.96\sqrt{\frac{p(1-p)}{n}}$? 2017-03-01T14:15:52.813

5 Basic question regarding variance and stdev of a sample 2010-07-28T12:02:21.063

5 Two sample test for both equal variance and mean 2012-04-30T15:27:24.760

5 Whether to use r-square or adjusted r-square with a small sample size that may represent the entire population? 2012-08-14T17:43:10.163

5 Multi-stage sampling together with hierarchical/ mixed effects models: which R packages? 2012-11-05T13:10:59.083

5 Why do they call it "sampling distribution of the sample mean"? 2013-10-30T18:44:55.693

5 Compare maxima of two Gaussian samples 2014-01-19T09:53:20.833

5 How to combine sample means and sample variances? 2014-05-14T07:23:19.473

5 How to detect random clicks on a page? 2015-01-11T07:11:28.420

5 Is there any modality summary statistic? 2015-09-19T17:46:24.477

5 Exercise on Chebyshev inequality compared to the Central Limit Theorem 2015-12-21T11:41:21.740

5 Sampling 100000 times from normal distribution in R : strange distribution of samples' standard deviation 2016-03-19T00:11:39.320

5 Overview of predictive modelling, machine learning, etc. 2016-04-16T01:14:52.220

5 How to Estimate Population Variance from Multiple Samples 2016-11-03T03:49:53.907

5 How does procedure failure rate affect sample size in a randomized clinical trial? 2016-12-30T14:44:54.463

5 What is the distribution of the sample variance for a Poisson random variable? 2017-02-10T17:53:19.707

4 Calculating significance of difference between two binary values on one dataset 2010-11-25T16:32:33.287

4 Probability that two values drawn at random from a normal distribution are separated by at most T 2011-03-17T00:30:01.570

4 Dependent vs. independent samples 2012-04-11T01:33:17.267

4 Identifying the population and samples in a study 2012-07-02T01:37:16.797

4 Correcting sample bias 2012-07-13T09:51:29.720

4 Confusion between sample and population 2012-10-02T04:16:46.093

4 Expectation of the sample median for symmetric distributions 2013-02-05T17:08:34.557

4 Estimating parameters of a normal distribution from noisy observation of samples 2013-02-19T20:23:17.257

4 Definition of a sample: can it include the same object twice? 2013-02-21T13:42:01.743

4 Population Variance and Sample Variance 2013-03-03T13:31:16.290

4 Population standard deviation for a binomial(?) distribution? 2013-05-16T20:40:17.893

4 How to sample from an exponential distribution using rejection sampling in PHP 2013-08-25T08:07:14.950

4 How to deal with non random samples? 2013-10-06T09:09:35.460

4 Why describe a sample as i.i.d.? 2013-11-16T00:54:37.507

4 Problems with the sample (unkown population) 2014-04-26T18:02:06.150

4 Difference between sample and sequence in Law of Large Numbers 2014-05-26T22:46:57.807

4 Characterization of normal distribution 2014-06-04T12:56:53.523

4 Finding the sample space of an experiment 2014-10-19T17:38:05.697

4 Is this a Random or Purposive Sample? Inclusion-Exclusion Criteria and the Sampling Frame 2015-02-24T21:45:08.503

4 Estimate of population total 2015-10-14T13:21:05.040

4 SD probability problem involving chi-square distribution 2016-01-21T23:55:07.567

4 Difference between errors and residuals. What is the mean and variance of each of them? 2016-03-12T08:26:14.930

4 What is the difference between standard error and margin of error and when to use which? 2016-03-16T14:11:24.650

4 What is the effect of using survey sample weights for a sub-sample? 2016-06-11T05:39:48.723

4 Systematic sampling and informed consent: Does the requirement for informed consent introduce sampling bias into randomly selected samples 2016-06-28T09:41:25.420

4 What is the difference between random variable and random sample? 2016-10-11T01:16:45.387

4 Sample Covariance 2016-10-28T15:19:56.317

4 Does this sampling without replacement have a name? 2017-01-31T15:24:32.943

4 How do I compare collections of samples for differences? 2017-03-04T15:03:11.360

4 Statistical significance of the residual in a particular cell in a Contingency table. Extrapolation from a Sample to the Population 2017-04-10T19:56:47.983

4 Samples size with sample proportion close to 0 or 1 2017-05-03T15:43:08.977

4 What kind of samples do I have 2017-08-26T14:05:57.860

4 Compute (bootstrap?) expected difference between two samples 2018-01-08T15:07:36.007

3 How to compare observed distribution to sampled distributions, using cumulative distibution function? 2012-03-05T09:03:03.490

3 How to calculate the 'loss' in information when decreasing sample size? 2012-11-01T12:30:40.690

3 How can I find the standard deviation in categorical distribution 2013-03-03T17:16:15.560

3 How to standardise cases within groups to perform ranking across groups and over time? 2013-05-16T20:44:01.953

3 Relevance of opinion poll (500 people from 10.5 millions) 2013-07-12T08:02:27.173

3 SPSS: "Weight cases" by multiple factors, by taking the product of weights? 2013-07-24T22:43:02.137

3 Exact distribution of sample mean of a continuous distribution 2013-09-02T15:32:44.727

3 Rank-sum test and conditional probability 2013-10-05T00:37:06.103

3 How to compare sampled areas to the Census? 2013-12-16T22:41:08.513

3 Algorithm to take samples from binomial data 2014-01-13T14:47:32.497

3 Is my data representative of Bristol? 2014-02-24T18:10:49.577

3 Sample from a custom continuous distribution in R 2014-03-04T12:40:54.160

3 Way to correct sample selection bias with unknown selection? 2014-03-17T23:10:26.223

3 Where is traditional inference really relevant? 2014-03-21T13:17:24.750

3 Check if sample is representative of a larger sample 2014-05-13T18:13:39.627

3 Weighted sample covariance 2014-06-06T20:43:16.890

3 wilson's adjustment for sample proportion 2014-07-26T05:22:37.480

3 Out-of-time testing (basic question) 2014-07-27T02:16:27.813