Use this information to answer the next two questions:

Difference in age between husbands and wives (husband age minus wife age) of BYU married couples has an approximate Normal distribution with a mean of 1.5 years and a standard deviation of 2.1 years. Negative differences indicate that the wife is older.

21.

Approximately what percentage of BYU married couples are wife-older marriages (i.e., what percent of BYU married couples have a difference less than 0)?

• 13.7%
• 23.9%
• 5.8%

• 76.1%

2.

Referring to the information above, what is the value of a difference such that 60% of the age differences are less than it?

• 0.45 years

• 1.78 years

• 0.96 years

• 2.03 years

Please can you help me with a better explanation about question and Thank you