Queenofpizza
13.11.2019 •
Mathematics
Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of 50$. find the probability that a worker selected at random makes between $350 and $400.
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Ответ:
.34 or 34%
Step-by-step explanation:
You should probably draw and label a normal distribution curve to help you visualize the problem.
The mean is in the middle and is where you start from. Normal distribution curves go out 3 standard deviations from the mean, and the standard deviation you are given is 50.
Therefore, 1 standard deviation under/below the mean would be 400 - 50 = 350.
Standard deviations have a set percentage/probability from the mean. I'm sure you've heard of the 68-95-99.7 rule? One standard deviation from the mean is 68%, but since you only want one standard deviation under the mean, you can divide by 2 to get 34%.
So there is a 34% chance that a worker selected at random makes between $350-$400.
Ответ:
2 ( Option A )
Step-by-step explanation:
The given integral to us is ,
Here 5 is a constant so it can come out . So that,
Now we can write √x as ,
Simplify ,
By Power rule , the integral of x^3/2 wrt x is , 2/5x^5/2 . Therefore ,
On simplifying we will get ,