Question

Chapter 9, Section 1, Exercise 023 Rain and Hantavirus in Mice Hantavirus is carried by wild rodents and causes severe lung disease in humans. A recent study on the California Channel Islands found that increased prevalence of the virus was linked with greater precipitation. The study adds "Precipitation accounted for 79% of the variation in prevalence." "More Rain, More Virus," Nature, April 28 2011, p. 392. (a) What notation or terminology do we use for the value 79% in this context? 0 0 0 0 Standard error 0 0 0 p-value

Answer 1

Solution: a) is the notation for the 79%.

79% is the variation and variation is explained by the notation .

b) Precipitation is the response variable

Prevalence is the explanatory variable.

Here if Prevalence is increased then Precipitation is also increased. Response variable dependent on Explanatory

variable.

c) Taking the square root of 0.079(79%), we get the correlation.

r=0.889 (correlation between the two variables).