as 0.95 is the same as decreasing by 5%
extra help:
to increase by 5% you times by 1.05x
Graham uses a 10 by 10 grid to model a decreasing pattern. He cuts off a section representing a percent of the current area so t
hat the remaining area represents the next term in the pattern, rounded to nearest whole centimeter. The area after each cut is shown on the graph.
After each cut, the remaining area is___% of the previous area
After each cut, the remaining area is___% of the previous area
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as 0.95 is the same as decreasing by 5%
extra help:
to increase by 5% you times by 1.05x
Answer:
The probability that between 79% and 81%of the 500 sampled wildlife watchers actively observed mammals in 2011 is P=0.412.
Step-by-step explanation:
We know the population proportion π=0.8, according to the 2011 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation.
If we take a sample from this population, and assuming the proportion is correct, it is expected that the sample's proportion to be equal to the population's proportion.
The standard deviation of the sample is equal to:
With the mean and the standard deviaion of the sample, we can calculate the z-value for 0.79 and 0.81:
Then, the probability that between 79% and 81%of the 500 sampled wildlife watchers actively observed mammals in 2011 is: