SOLUTION: The natural remedy echinacea is reputed to boost the immune system, which will reduce flu and colds. A 6-month study was undertaken to determine whether the remedy works. From this

Algebra ->  Probability-and-statistics -> SOLUTION: The natural remedy echinacea is reputed to boost the immune system, which will reduce flu and colds. A 6-month study was undertaken to determine whether the remedy works. From this      Log On


   

Question 1127317: The natural remedy echinacea is reputed to boost the immune system, which will reduce flu and colds. A 6-month study was undertaken to determine whether the remedy works. From this study, the following probability distribution of the number of respiratory infections per year (X) for echinacea users was produced:
X 0 1 2 3 4
P(X) 0.35 0.32 0.2 0.071 0.059
Find the following probabilities:
A. An echinacea user has more than one infection per year
B. An echinacea user has no infections per year
C. An echinacea user has between one and three (inclusive) infections per year
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
That is 1-0 and 1 infections a year or 0.33
That is 0.35
Between 1 and 3 is the sum of 0.32, 0.2, and 0.071 or 0.591