Question 473481: Birth weights are normally distributed with a mean weight of 3285 grams and a standard deviation of 500 grams.
What is the probability of a birth weight more than 3285 grams?
What is the probability that the birth weight is between 2785 grams and 3785 grams?
What is the probability that the birth weight is between 785 grams and 5785 grams?
Is the area to the right of X = 4285 greater than or less than 0.5? Without calculating, how would you know this?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Birth weights are normally distributed with a mean weight of 3285 grams and a standard deviation of 500 grams.
-------------------------
What is the probability of a birth weight more than 3285 grams?:::0.5000
------------------------------------
What is the probability that the birth weight is between 2785 grams and 3785 grams?
Ans using TI-84: normalcdf(2785,3785,3285,500) = 0.6827
-------------------------------------------------------------
What is the probability that the birth weight is between 785 grams and 5785 grams?
Ans: normalcdf(785,5785,3285,500) = 1.00
---------------------------------
Is the area to the right of X = 4285 greater than or less than 0.5? Without calculating, how would you know this?
---
Less than 0.5000 because 4285 is to the right of the mean, and
the mean has a right tail of 0.5000.
=============================================
Cheers,
Stan H.
===============
|
|
|
