Creatine monohydrate is a widely used dietary supplement among athletes to improve muscle performance. A study was performed to investigate if there is any influence of short-term creatine supplementation on musculoskeletal damage in mountain climbers. In this study 8 middle-aged male hikers with 2 years of hiking experience were randomly selected and subjects were asked to consume creatine supplement over 5 days before data collection. To collect data, biood samples were taken once before ascending a mountain peak, and then once more after returning from the peak. Blood samples were measured for lactate dehydrogenase (LDH) enzyme activity (units/litre), where an increase in activity indicates muscle cell darnage. The results are presented below. Make sure you carefully read through the output before attempting the questions. before =c(312,8,281,3,282.4,171,6,290,2,397,5,216.4,243.5) after =c(321.5,299.6,311,0,296.1,439.9,347.2,373.0,222.1) ldh