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In: Statistics and Probability

the time it takes for babies to learn to walk is known to be normal distributed...

the time it takes for babies to learn to walk is known to be normal distributed with mean 9 months and standard deviation of 1.5 months. what percent of babies learn to walk.

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Expert Solution

  

here in the given question mean = 9-month

standard deviation =1.5 month

we have to find the percentage of babies learn to walk in the given time between 7.5 months() to 10.5 months( )

hence,

step 1:

find the z value:i.e.

Z=(X-)/

Hence the percentage of babies to walk in a given interval is =(0.68268*100)= 68.27%

orchestra answered 2 years ago
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