Dr Khan wants to determine whether temperature affects sleep cycles in sheep He monitors a herd of sheep for 24 hours in December after a period of 10 days in which the average daytime temperature was 5 C He does the same again the following July after a period of 10 days in which the average Virtua daytime temperature was 25 C The sheep slept less in summer He concludes that heat makes sheep sleep less What is the problem with this statistical analysis O Non independent replicates O Multiple comparisons O Confounding variables O cheating O undisclosed flexibility