Obesity in NYC elementary schools is highest among Hispanic children – nearly 1 in 3 35 31 30 25 23 20 16 14 15 10 White Black Hispanic Asian Percent of elementary school children who are obese
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 bar graph below summarizes information a
New York City Survey of Elementary School Children
(NYC DOHMH and DOE 2003). In a random sample
of 400 Hispanic NYC schoolchildren, what is the
expected number who are obese and the standard
deviation?A)
B) mean 148; standard deviation 7.7
C) mean 124; standard deviation 9.25
D) mean 148; standard deviation is 9.66
E) mean 124; standard deviation 11.1355
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
