A potter works 4 days a week, makes 15
2 answers:
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Answer:
Step-by-step explanation:
We define X the random variable that represent the heights of a population for ten year old children, and for this case we know the distribution for X is given by:
Where and
We want to find this probability:
We can use the z score formula to solve this problem given by:
Using this formula we have:
And we can find this probability with this difference
We can use tables for the normal standard distribution, excel or a calculator and we got this
Answer: {-2,3 }
X>-2
X<3
X>-2
X<3