The mean and variance of any normal distribution are always zero ...

[stephzh]

The mean and variance of any normal distribution are always zero and one, respectively.
 
  Indicate whether the statement is true or false

Question 2

What is the probability that the man does work?
 
  What will be an ideal response?

[firehawk60]

Answer to Question 1

FALSE

Answer to Question 2

P(both man and woman are not working) = 1 - 0.88 = 0.12
P(woman doesn't work  man doesn't work) = 0.40
P(man does not work) = P(both man and woman are not working)/0.40
= 0.12 / 0.40 = 0.30
P(man works) = 1 - P(man doesn't work) = 1 - 0.30 = 0.70

[stephzh]

Thanks for the timely response, appreciate it

[ryhom]

Excellent