87.9k views
5 votes
the weights of koala bears are normally distributed with a mean of 20 lbs and a standard deviation of 3 lbs. approximately what percentage of koala bears weigh more than 11 lbs?

User Omarion
by
7.6k points

1 Answer

1 vote

Answer:

99.7%

Explanation:

μ = 20 lbs

τ = 3 lbs

x = 11 lbs


Z=(x-\mu)/(\tau)


=(11-20)/(3)


=-3

P(x>11) = 99.7%

User Shawnjan
by
7.1k points