![Sample size calculation for small sample single-arm trials for time-to-event data: Logrank test with normal approximation or test statistic based on exact chi-square distribution? | Semantic Scholar Sample size calculation for small sample single-arm trials for time-to-event data: Logrank test with normal approximation or test statistic based on exact chi-square distribution? | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/4cb6f6bf7110534c9aef1f112542490fded0c9ec/2-Table1-1.png)
Sample size calculation for small sample single-arm trials for time-to-event data: Logrank test with normal approximation or test statistic based on exact chi-square distribution? | Semantic Scholar
![Statistical tests_01 (Note: Fischer test in place of chi square if sample size is less than 30) | Economics lessons, Statistics math, Chi square Statistical tests_01 (Note: Fischer test in place of chi square if sample size is less than 30) | Economics lessons, Statistics math, Chi square](https://i.pinimg.com/originals/00/0b/70/000b70a4c011a6f97f813acec9eada44.jpg)
Statistical tests_01 (Note: Fischer test in place of chi square if sample size is less than 30) | Economics lessons, Statistics math, Chi square
![SOLVED: The obtained (calculated) chi square statistic: is sensitive to sample size must always be modified using the Yates's correction can be negative or positive is always negative SOLVED: The obtained (calculated) chi square statistic: is sensitive to sample size must always be modified using the Yates's correction can be negative or positive is always negative](https://cdn.numerade.com/ask_images/8bbb138cc3c64332a4c2f23d5820d5d0.jpg)