Mathematics
Mathematics, 29.01.2020 01:45, alex43079

Curiously, during months when sales of beer are above average, sales of ice cream also tend to be above average, and during months when sales of beer are below average, sales of ice cream also tend to be below average. which of the following can we conclude from these facts? (a) for a lot of people, drinking beer causes a desire for ice cream, and vice versa. (b) the correlation between "beer sales" and "ice cream sales" is negative.(c) a scatterplot of monthly beer sales vs. monthly ice cream sales would show a horizontal line pattern. (d) there may be a lurking variable causing higher beer and ice cream sales during some months and lower beer and ice cream sales during other months

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