I only need assistance with question D. Thank you! The probability histogram to
ID: 3340628 • Letter: I
Question
I only need assistance with question D. Thank you!
The probability histogram to the right represents the number of live births by a mother 50 to 55 years old who had a live birth in 2012. 0.3 0.2 1L234 11.15 113 .098 034-0.04 D.0 1 234 5 6 (a) What is the probability that a randomly selected 50-to 55-year-old mother who had a live birth in 2012 has had her fourth live birth? 113 (Type an integer or a decimal.) (b) What is the probability that a randomly selected 50-to 55-year-old mother who had a live birth in 2012 has had her fourth or fifth live birth? 209 (Type an integer or a decimal.) (c) What is the probability that a randomly selected 50- to 55-year-old mother who had a live birth in 2012 has had her sixth or more live birth? 104 (Type an integer or a decimal.) (d) If a 50-to 55-year-old mother who had a live birth in 2012 is randomly selected, how many live births would you expect the mother to have had? (Round to one decimal place as needed.)Explanation / Answer
The formula for expected value is E(x) = xf(x)
= 1*0.234 + 2*0.291 + 3*0.162 + 4*0.113 + 5*0.096 + 6*0.021 + 7*0.034 + 8*0.049
= 2.99.
= 3.0.