anonymous
  • anonymous
The heights of a certain species of plant are normally distributed, with mean 23 cm and standard deviation 1 cm. What is the probability that a plant chosen at random will be will be between 20.5 and 25.5 cm tall?
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
do you know about converting to standard normal and using z score?
anonymous
  • anonymous
im learning it sorta
anonymous
  • anonymous
ok well the formula to convert to a value of z: \[(X-\mu)/\sigma\]

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anonymous
  • anonymous
so you would have (25.5-23)/1 and (20.5-23)/1 -2.5
anonymous
  • anonymous
then you can look up the probability on a standard normal chart. Try that and let me know if you need help

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