Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Probability again

  1. Apr 19, 2007 #1
    In poor countries, the growth of children can be an important indicator of general levels of nutrition and health. Data from several studies suggest that a reasonable model for the probability distribution of the height (in cms) of a randomly selected 5 year old child is normally distributed with mean 100 cms and standard deviation 6 cms.

    a) What proportion of height is between 94 and 112 cms?
    b) What is the probability that a random chosen five year old child will be taller than 110 cms.
    c) If two five-year old children are drawn at random, what is the probability that exactly one of them will be taller than 110 cms.

    It is given that area under a standard normal distribution between z = 0 and given values of z are as follows:
    For z = 1.00 area = 0.3413
    For z = 1.67 area = 0.4523
    For z = 2.00 area = 0.4772
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted