レ optioncommand 9t command option success-male pb 0158 40.040.412 1.010.0) 1(-0.04) 1.000
I need help. I can tell I went wrong somewhere. I put my answers in italics. I believe my proportion values are incorrect, but not sure what they should be. Thank you
Records for the population of American hospital births show that 104 males are born for every 100 females when pregnancies are of normal gestational age (33-36 weeks). However, premature births have a sex ratio of 115 males to 100 females.
a) What is the proportion of males in births at normal gestational age? What is the proportion when births are premature?
Normal gestational age -1.04 males males to females
Premature births - 1.15 males to females
- b) You are shown the record of births on January 21, 2015 at a particular hospital. Unfortunately, someone has failed to fill in the part of the record that tells you if these records are from the ICU (where the premature infants stay) or from the regular maternity ward (where the full-term infants stay). If there are 9 babies born that day and 7 of them are males, what is the
probability of getting exactly 7 males, assuming that they come from the regular maternity ward? Show all work.
(Calculations Attached)
Pr[7 males] = 0.0758
- c) What is the probability of getting 7 or more males, assuming they come from the regular maternity ward? Show all work.
(Calculations Attached)
Pr[7 or more males] = 1.006
- d) Without performing the calculation: if we change our null hypothesis to assume that the babies are from the ICU, would we expect that the probability of a result of 7 males to be higher, lower, or the same? Explain.
We would expect the probability of a result of 7 males to be higher because there is a greater proportion, which would increase the amount of males we would expect to see.
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