search for: overwint

Displaying 3 results from an estimated 3 matches for "overwint".

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2009 Apr 24
1
what is this experimental design (mixed-effects model)?
Dear R community, I am wondering what experimental design I am dealing with? I study the effect of daily air temperature on daily body temperature of the overwintering turtles (i.e. sleeping in soil). The model is a cosine wave with the air temperature as a covariate. Objects are 19 overwintering turtles. Data were combined over the three years. Each turtle was studied only once during these years, while 2 turtles were studied during two years (see table...
2009 Mar 15
1
Tukey, planned contrasts or t-test without ANOVA? What is correct?
Dear R community, I compare mean monthly body temperature between two age classes of turtles overwintering underground. lm(body_tem ~ Month*Year*Age_Class) TukeyHSD(aov(body_tem ~ Month*Year*Age_Class, a)) The Tukey HSD as well as the planned contrasts method showed significant differences between the two age classes, but insignificant differences between the two age classes at the same levels...
2009 Mar 20
1
Is this sample size big enough to test for statistical significance?
Dear R community, Is this sample size large enough to study differences between two groups of the populations? Q1: do the body temperatures differ between the two groups of the overwintering turtles juveniles and adults? One group (adults) has 6 turtles Second group (juveniles) has 1 turtle. There are 3 replications, i.e. the experiment was repeated over the three years, but using different turtles. We had about 130 observations (daily body temperature) per each turtle per...