Malaria is a leading cause of infectious disease and death worldwide. It is also

Question

Malaria is a leading cause of infectious disease and death worldwide. It is also a popular example of a vector-borne disease that could be greatly affected by the influence of climate change. Table 1 is a summary from a linear regression that uses dewpoint (C) to predict malaria prevalence in West Africa. Dewpoint 0.0036010.0014432495 0.0134 0 2471 R20 02852 Fig. 1: Regression (a) Write the equation of the least square regression line. (b) Find the correlation coefficient r. (c) Is there a strong correlation between dewpoint and malaria prevalence in West A frica? (d) Is there a negative association between dewpoint and malaria prevalence in West

Explanation / Answer

a)
y^ = 0.731243 -0.003601 * DewPoint {look at estimate column}
b)
r = (sign of slope) sqrt(r^2) = - sqrt(0.02852) = 0.16887
c)
p-value for slope = 0.0134 > 0.05 {assumed significance level}
hence there is strong correlation between two variables
d)
yes since slope(-0.003601) is negative.

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