Linked Questions

0
votes
0answers
23 views

Statistical test for sample size equals one [duplicate]

I know statistical test usually requires "enough" samples to estimate the uncertainties. But what if I have only one sample in each group, and also I "know" which distribution this ...
28
votes
4answers
15k views

How to perform Student's t-test having only sample size, sample average and population average are known?

Student's $t$-test requires the sample standard deviation $s$. However, how do I compute for $s$ when only the sample size and sample average are known? For example, if sample size is $49$ and sample ...
3
votes
3answers
21k views

If I only have a range, is it acceptable to calculate an average out of it?

Supposed I have only this data point available: Concentration = (1.1 - 2.0 g/L). Is it acceptable to conclude : ...
6
votes
3answers
837 views

Which statistical test to use when there's no data of SD but just know the mean?

In our lab, we work with the retina which yields very little sample. Although we have a reasonable sample size of six animals in each group, I don't understand which test to be used to test for ...
2
votes
1answer
3k views

How much sense does median of one number make?

Median of one number = the number itself. I am calculating the median price sq ft of properties of different areas based on the different data entries I have got that include their ID, area and ...
3
votes
4answers
400 views

How can I get the CI of a couple of numbers?

Is it possible to get the Confidence Interval of a couple of numbers (or more) without knowing the distribution or anything like that ? Thanks.
1
vote
1answer
1k views

Comparing pre and post test raw scores with one subject

I am currently in the process of trying to analyze data from research carried out. I am analyzing whether a music intervention showed improvements in rate, accuracy, fluency, and comprehension on a ...
2
votes
1answer
85 views

Reliability of single case reports vs group inference

In his paper "Ten ironic rules for non-statistical reviewers", Karl Friston includes the following tongue-in-cheek response of a fictional author to a reviewer who complains about the sample size ...
1
vote
0answers
61 views

Calculate confidence interval for difference in means between 2 samples without individual sample values

I have 2 samples, each containing 4 individual measurements, but I do not know what the individual measurements are, only what the group mean was for each sample. Is it possible to construct a ...
0
votes
0answers
16 views

A Sample is a a Single Data Point, or a Pool of Data Points?

This question has confused me a lot in statistics. I think in Statistics, a sample is a pool of data points from the PDF, rather than a single data point, am I correct? In everyday language if you ...