Over the course of the Ebola pandemic in Africa, the average age of people who have died from Ebola is 73. But since February, the average age of Ebola victims is 67. And since June, theaverage age is 66 with a standard deviation of 6 years, according to data from the WHO. WHO officials said the decrease in the average age ofthose dying from Ebolais likely related to lower vaccination rates among younger adults. While 86% of Africans ages 50 to 64 have received at least one dose ofthe Ebola vaccine,as have 81% of African seniors, only 76% of younger adults have received such a shot, and 63% of teenagers and adolescents ages 12 to 17.

The sample size is not given in the scenario so for question 3 for the standard error use the symbol"n" as a placeholder in the answer.

1. Using these statistics, estimate the mean age of persons who have died of Ebola in Africa since February.
2. Using these statistics, estimate the standard error of the sample mean age of persons who have died of Ebola in Africa since February.
3. Using these statistics, estimate the proportion of persons aged 50 to 64 who have received at least one doseof an Ebola vaccine in Africa?
4. Using these statistics, estimate the standard error of the proportion of persons aged 50 to 64 who have received at least one doseofan Ebola vaccinein Africa?
5. Is it reasonable to use data from Africa to estimate these Ebola-related parameters: the population average age of death since February and persons aged 50 to 64 have received at least one doseofan Ebola vaccine in Africa? Why or Why not, explain briefly.