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# i didn t understand :(

0
888
3 Feb 14, 2016

#2
+10

Look at the graph and note that strain C has the least virulence in March. Use this point in time and calculate the weighted average to determine the efficacy of the vaccine.

To calculate the weighted average, take the (March) prevalence of each strain and multiply it by the efficacy of the vaccine in the table. Then add these products.

\((0.35 * 0.23) + (0.13 * 0.25) + (0.76 * 0.13) + (0.68 * 0.39) =0.447 ~|~(47.7\%)\)

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Now if only we could develope a vaccine for CDD

Feb 15, 2016

#1
0
.
Feb 14, 2016
#2
+10

Look at the graph and note that strain C has the least virulence in March. Use this point in time and calculate the weighted average to determine the efficacy of the vaccine.

To calculate the weighted average, take the (March) prevalence of each strain and multiply it by the efficacy of the vaccine in the table. Then add these products.

\((0.35 * 0.23) + (0.13 * 0.25) + (0.76 * 0.13) + (0.68 * 0.39) =0.447 ~|~(47.7\%)\)

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Now if only we could develope a vaccine for CDD

Nauseated Feb 15, 2016
#3
+5

thank you Nauseated !

Feb 15, 2016