Advanced Placement (AP), 10.08.2019 08:10 Isa035
The ages of rocks in an isolated area are known to be approximately normally distributed with a mean of 7 years and a standard deviation of 1.8 years. using the normalcdf function on your graphing calculator, what percent of rocks are between 5.8 and 7.3 years old?
a. 31.4%
b. 37.5%
c. 3.14%
d. 41.3%
Answers: 3
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