Question

Having trouble with these questions, please help.

Answer 1

(a)=50%(b)=2.1and(c)=16.1

Explanation:

Hope this helps

Answer 2

The Empirical Rule affirm:

99.7 % random variable values are between
±
three standard deviation.

95 % random variable values are between
±
two standard deviation.

68 % random variable values are between
±
one standard deviation. There you go!