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  1. C

    One way ANOVA or Two Way ANOVA?

    Hi all. I was given this assignment and asked to analyse the data (5% level of significance). Should I be using two one-way ANOVAs to compare the effect of preservative and days (independent variables) on the bacterial count (dependent) separately? Or should I be using a two-way ANOVA to...
  2. C

    Using Residuals to Make Conclusions

    Hi, I was recently given an assignment to analyse the residuals for 4 days of the following data. After plotting the residuals, what does this tell me about my data? I'm a bit confused with the context. Thanks. I found the residuals by subtracting the observed value from the overall mean of...