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For my research data, I decided to analyze it using the Kruskal-Wallis statistic test. This allows me to compare the median of my response variable to multiple intervals of my predictor variable. I used Minitab 18 to coordinate the data and calculate the medians, means and standard deviations which I then used to for the graph below.
Fig.1. Average squirrel abundance measured at View Royal Park in relation to the number of domestic dogs present.
The average amount of squirrels was calculated within each interval and plotted here with error bars that were calculated using the individual standard deviation. There is an inverse relationship between the number of dogs present and the number of squirrels observed. The statistical test used to analyze this data was the Kruskal-Wallis test. The P-value was found to be P<0.05, therefore, we can reject the null hypothesis and all the means are different.
good work overall!
note should be ‘number’ vs ‘amount’ of squirrels
regards