15 ecological experiments

Question 1

data analysis
tools:

Answer 1

*comparative studies:
➢ t-test
➢ Analysis of variance (ANOVA)
*data was collected over a series of time intervals or involve 3 or more sets of data over time:
➢ Repeated measures ANOVA
*seek to establish relationships, identify trends and patterns:
➢ Regression

Question 2

Data analysis using analysis of variance

Answer 2

➢ Completely randomized design (CRD)
in four growth chambers on budding in a tree species
➢ Randomized complete block design (RCBD)
at five locations along a latitudinal gradient,
with distinct climatic conditions

Question 2

Data Analysis using the t-test

Answer 2

from two locations with distinct temperature or precipitation, Data could be obtained
from several points at each location

Question 3

Data analysis using repeated measures ANOVA

Answer 3

*a completely randomized design to test in a green house at 4, 8, 12, 16 and 24 and 48 weeks
*measurements are taken over several time intervals
*null:the treatments to the plants or animals in the experiment are subjected have no effect on them((p > 0.05))
*alternate:have an effect on them(p < 0.05)

Question 4

Regression Analysis

Answer 4

*coefficient of determination (r2) (between 0 and 1) between an independent variable (x) and dependent variable (y)
*develop a scatter plot, A regression curve is fitted, r2 –value is obtained

Question 5

Data Analysis Software

Answer 5

➢ SPSS
➢ Sigma Plot
➢ Math Lab
➢ R
➢ Excel(not be
suitable for carrying
out advanced and
complex data analysis, but it can be useful for
preparing data sets for mean, standard
deviation)