Ecological methods and presenting data
questions with verified answers.
Data assumptions (4) - Correct Answer data are normally distributed
samples were random
variances were homogeneous
samples are independent
Population vs sample (2) - Correct Answer population includes all elements from a set of data
a sample consists of one or more observations drawn from the population
Randomly sampled - Correct Answer avoids bias and unwanted effects
Independent samples - Correct Answer sample has not been affected by, or is not related to other
samples from the population
Normal distribution - Correct Answer assume that 68% of sample falls within 1SD, 95% within 2SD, and
99% within 2.5SD
Standard error definition and 2 assumptions - Correct Answer like the standard deviation but for the
population
assume
- big enough sample
observations are normally distributed
t-test (2) - Correct Answer calculates the probability of obtaining such a difference between pairs of
sample means
can be one tailed or two tailed
ANOVA - Correct Answer assumption of normal distribution
compares the means of two samples
questions with verified answers.
Data assumptions (4) - Correct Answer data are normally distributed
samples were random
variances were homogeneous
samples are independent
Population vs sample (2) - Correct Answer population includes all elements from a set of data
a sample consists of one or more observations drawn from the population
Randomly sampled - Correct Answer avoids bias and unwanted effects
Independent samples - Correct Answer sample has not been affected by, or is not related to other
samples from the population
Normal distribution - Correct Answer assume that 68% of sample falls within 1SD, 95% within 2SD, and
99% within 2.5SD
Standard error definition and 2 assumptions - Correct Answer like the standard deviation but for the
population
assume
- big enough sample
observations are normally distributed
t-test (2) - Correct Answer calculates the probability of obtaining such a difference between pairs of
sample means
can be one tailed or two tailed
ANOVA - Correct Answer assumption of normal distribution
compares the means of two samples
