sample

Thoroughly stir the population of jabberwockies and pick one at random, then stir again and pick another independently of the first, and so on until you have $50$ jabberwockies.

Do you have $50$ samples, or one sample consisting of $50$ independent observations?

It seems that in signal processing and data science and various other disciplines, this is called $50$ samples, and in statistics it is one sample.

Notice that the term "sample size" is commonplace: the size of this one sample is $50.$ And the two-sample t-test is called the two-sample t-test. A two-sampe t-test may use one sample of $50$ northern jabberwockies and another sample of $40$ southern jabberwockies.

sample

Thoroughly stir the population of jabberwockies and pick one at random, then stir again and pick another independently of the first, and so on until you have $50$ jabberwockies.

Do you have $50$ samples, or one sample consisting of $50$ independent observations?

It seems that in signal processing and data science and various other disciplines, this is called $50$ samples, and in statistics it is one sample.

Notice that the term "sample size" is commonplace: the size of this one sample is $50.$ And the two-sample t-test is called the two-sample t-test. A two-sample t-test may use one sample of $50$ northern jabberwockies and another sample of $40$ southern jabberwockies.