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Refer to the exhibit:
The box plot was used to analyze daily sales data following three different ad campaigns.
The business analyst concludes that one of the assumptions of ANOVA was violated.
Which assumption has been violated and why?
Suggested Answer: D
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11 comments · newest first
SH
Shawna
12 months ago
Normality violation makes sense, especially with those ranges!
LU
Luis
12 months ago
I think it’s definitely constant variance, but the Prob > F thing is confusing.
KA
Kayleigh
1 year ago
Wait, are we sure it's not normality? That seems off.
TH
Thea
1 year ago
Totally agree, the interquartile ranges are all over the place!
VA
Vallie
1 year ago
Looks like constant variance is the issue here.
MI
Miriam
1 year ago
I’m leaning towards option D because the differences in interquartile ranges seem significant, but I’m not completely confident in my choice.
EM
Emeline
1 year ago
I practiced a similar question where we had to identify assumptions based on box plots. I feel like normality is key, but I’m confused about the role of Prob > F.
CU
Curtis
1 year ago
I think the constant variance assumption might be violated if the interquartile ranges are different, but I can't recall the exact details.
DU
Dulce
1 year ago
I remember that ANOVA assumes normality, but I'm not sure how to tell if it's violated just from the box plot.
NA
Natalie
1 year ago
Easy peasy! The output will definitely be 2. The increment function modifies the original $val variable, so the change will be reflected in the final echo.
RE
Rex
1 year ago
I'm not entirely sure about this one. I'll need to review the differences between virtual and override methods to determine the best approach. Maybe I'll try to eliminate the options that don't seem quite right.