Q. Under which of the following circumstances ‘t’ distribution is used? (Solved)
1. sample size less than or equal to 30
2. population standard deviation is unknown
3. both (a) and (b)
4. none of these
- c. both (a) and (b)
1. sample size less than or equal to 30
2. population standard deviation is unknown
3. both (a) and (b)
4. none of these