Answer:
68,3 %
Step-by-step explanation:
Empirical rule establishes:
In a normal distribution with mean μ and standard deviation σ we have a relation between values of the distribution and intervals describes as follows:
( μ ± σ ) contains 68.3 % of all values of the distribution
( μ ± 2σ ) contains 95,4 % and
( μ ± 3σ ) contains 99.7 %
In our particular case we have that
( μ ± σ ) ⇒ ( 70 ± 5 ) ⇒ ( 65 , 75 )
( μ ± 2σ ) ⇒ ( 70 ± 10 ) ⇒ ( 60 , 80 ) and
( μ ± 3σ ) ⇒ ( 70 ± 15 ) ⇒ ( 55 , 85
As we can clearly see 68,3 % of values fall between values going from 65 up to 75 inches
