Upper and lower bounds on the average life expectancy.
The average life of Canadian women is 73.75 years and standard deviation of the women's life expectancy in Canada is 6.5 years. Find out the minimum percentage of women in Canada whose life expectancy is between 64 and 83.5 years. Conclude the upper and lower bounds on an average life expectancy of the Canadian women such that at least 90% of all population is included.