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Hello, students, we are going to write here the average age of vehicles registered in california is 97 months.
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With the standard deviation is given, we need to find the probability that the mean age of a sample of 33 vehicles is between 94 and 96 months.
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So let's start with our answering part.
00:19
What we are given here, we are given here normal distribution.
00:24
And if i write here for this, in the normal distribution, if i write here all the random variable, are distributed amongst bell shaped curve, something like this.
00:34
If i write here, all the random variables are distributed amongst bell shaped curve.
00:42
This is jared, this is minus jr, this is probability of p z.
00:45
Right -hand side area is 0 .5, left -hand side area is 0 .5.
00:48
It means that area is symmetric about y -axis.
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So let's start with our answering part...