29.10 Quick review questions

A study (Bacho et al. 2019) compared joint pain in stroke patients before and after a supervised exercise treatment. Participants (\(n=34\)) were assessed before and after treatment. The mean change in joint pain after 13 weeks was 1.27 (with a standard error of 0.57) using a standardised tool.

1. True or false? Only ‘before and after’ studies can be paired.
   TRUE FALSE
2. True or false? The null hypothesis is about the population mean difference.
   TRUE FALSE
3. The value of the test statistic (to two decimal places) is
   
4. The two-tailed \(P\)-value will be
   Very small Small About 0.05 Large Very large