Exercise 27-14: Ice Cream, Drownings, and Fire Damage a. Suppose a beach communi
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Question
Exercise 27-14: Ice Cream, Drownings, and Fire Damage a. Suppose a beach community keeps track of the amount of ice cream sold in a given month and the number of drownings that occur in that month. Would you expect to find a negative correlation, a positive correlation, or a correlation close to zero? Explain your reasoning If the community in part a were to find a strong positive correlation between ice cream sales and drownings, would that mean ice cream causes drowning? If not, suggest an alternative explanation (i.e., a confounding variable) for the strong association. b. c. Explain why you would expect to find a positive correlation between the number of fire engines that respond to a fire and the amount of damage done in the fire. Does this imply the damage would be less extensive if fewer fire engines were dispatched? Explain.Explanation / Answer
ANSWER :-
a. As number of drownings increases, this means temperature also increases. In summer, sale of ice cream goes up. Therefore, we would expect to find a positive correlation.
b. Correlation does not imply causation.
As number of drownings increases, this means temperature also increases.
In summer, sale of ice cream goes up. Therefore, the ice cream sale is up because of temperature (a confounding variable).
c. When fire is big, we expect more number of fire engines that respond to a fire and also amount of damage done in the fire is large.
Therefore, there seems an association between the number of fire engines that respond to a fire and the amount of damage done in the fire.
That does not imply the damage would be less extensive if fewer fire engines were dispatched.
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