At a middle school , 38% of all seventh graders have taken swimming lessons. There are 250 students in the seventh grade. How ma
1 answer:
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Answer: 0.4987
Step-by-step explanation:
Given : The weights of newborn baby boys born at a local hospital are believed to have a normal distribution with
Mean :
Standard deviation :
Let X be the random variable that represents the weight of randomly selected student .
Z score :
For x = 5 lbs
For x = 11 lbs
By using the standard normal distribution table , the probability that the weight of the newborn baby boy will be between 5 lbs and 11 lbs :-
Hence, the probability that the weight of the newborn baby boy will be between 5 lbs and 11 lbs =0.4987