The following table cross-clarifies pregnant women in a study by their BMI at 16 weeks gestation and whether they had pre-term delivery. what is the probability of women with BMI less than 30 and delivers pre-term? Also, What proportion of women with BMI greater than 35 deliverss pre-term? BMI<30 BMI 30-34.9 BMI 35+ Pre-term 320 80 120 Full term 4700 480 300
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
The following table cross-clarifies pregnant women in a study by their BMI at 16 weeks gestation and whether they had pre-term delivery. what is the
| BMI<30 | BMI 30-34.9 | BMI 35+ | |
| Pre-term | 320 | 80 | 120 |
| Full term | 4700 | 480 | 300 |
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