Ten water samples were taken from each of four lakes in the Kawarthas and samples were analysed for nitrate concentration. A researcher believes that average nitrate concentration is different among the lakes. What is the appropriate statistical test?

One sample t-test

Dependent samples t-test

Two independent samples t-test

ANOVA

Pearson's product moment correlation

Least squares regression

Contingency table (Independence

)Contingency table (Homogeneity)