What is the purpose of statistics in ecology?
Explanation: The correct answer is D) All of the above. Statistics in ecology serves the purpose of collecting and analyzing ecological data, making accurate predictions, and testing hypotheses to make inferences about ecological processes.
Which statistical test is commonly used to compare means of two groups in ecology?
Explanation: The correct answer is B) t-test. The t-test is commonly used in ecology to compare the means of two groups and determine if they are significantly different from each other.
What does p-value represent in statistical hypothesis testing?
Explanation: The correct answer is A) The probability of rejecting the null hypothesis when it is true. The p-value represents the probability of obtaining the observed data or more extreme results if the null hypothesis is true. A small p-value indicates strong evidence against the null hypothesis.
What is the purpose of regression analysis in ecology?
Explanation: The correct answer is A) To examine the relationship between two or more variables. Regression analysis is used in ecology to determine the relationship between a dependent variable and one or more independent variables, allowing researchers to understand and predict the effect of changes in the independent variables on the dependent variable.
What is the purpose of a null hypothesis in statistical testing?
Explanation: The correct answer is A) To establish a baseline expectation. The null hypothesis in statistical testing represents the assumption of no effect or no difference between variables. It serves as a reference against which the alternative hypothesis is tested to determine if there is sufficient evidence to reject the null hypothesis and support the alternative hypothesis.