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Researchers Are Interested in the Effects of Wind Direction and Season

Question 18

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Researchers are interested in the effects of wind direction and season on ozone levels in North America. The ozone levels were recorded at locations, along with the direction of prevailing winds (E, N, S, W) and the season (winter, spring, summer, fall) . A balanced design was carried out such that each combination was observed five times. A partial ANOVA table is provided here:
Based on the F statistic for the interaction, and using a 0.05 significance level, what should we conclude about the p-value for the interaction?
 Source  DF  SS  MS  F  Direction 129 Season 318 Interaction 423 Error 960 C. Total 1830\begin{array} { l l l l l } \text { Source } & \text { DF } & \text { SS } & \text { MS } & \text { F } \\\hline \text { Direction } & & 129 & & \\\text { Season } & & 318 & & \\\text { Interaction } & & 423 & \\\text { Error } & & 960 & \\\hline \text { C. Total } & & 1830 &\end{array}


A) It is less than 0.05, so a significant interaction is present.
B) It is greater than 0.05, so a significant interaction is present.
C) It is less than 0.05, so a significant interaction is not present.
D) It is greater than 0.05, so a significant interaction is not present.

Correct Answer:

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