Contents
What is the sample size of 3000?
Determining Sample Size
| Population | Sample | Population |
|---|---|---|
| 75 | 63 | 3000 |
| 80 | 66 | 3500 |
| 85 | 70 | 4000 |
| 90 | 73 | 4500 |
How many respondents is acceptable in descriptive research?
Researchers disagree on what constitutes an appropriate sample size for statistical data. My rule of thumb is to attempt to have 50 respondents in each category of interest (if you wish to compare male and female footballers, 50 of each would be a useful number).
How many respondents is acceptable in qualitative research?
We generally recommend a panel size of 30 respondents for in-depth interviews if the study includes similar segments within the population. We suggest a minimum sample size of 10, but in this case, population integrity in recruiting is critical.
How many respondents should a study have?
There are two schools of thought about sample size – one is that as long as a survey is representative, a relatively small sample size is adequate. Perhaps 300-500 respondents can work. The other point of view is that while maintaining a representative sample is essential, the more respondents you have the better.
How many unique observations are there in the data?
Unique observations are also often interpreted to mean those that occur precisely once in the data. Thus, if values of a variable are 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, and 5, then in one sense of “unique”, there are five distinct or unique values—namely, 1, 2, 3, 4,…
When to type nvals for number of distinct observations?
First, we read in that dataset, sort by that variable, and then we tag the first observation within each distinct group. nvals is 1 whenever a value is first in its group and is 0 otherwise. If this were indeed the problem, we should now just type
How many respondents do you need for a survey?
The number of respondents you need depends on your survey goals and how confident you want to be in your results. The more confident you want to be, the less of a margin of error you should accept.
Is the number of distinct observations a property of the output?
To put it another way, is uniqueness a property of the input (each value occurs once in the original) or of the output (each value occurs once in the result, because duplicates have been set aside)? Suppose, however, that we need to calculate the number of distinct observations for ourselves.