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sashaice [31]
3 years ago
13

The length of time it takes to get through the security checks at a very large urban airport is a random variable with mean μ =

20.6 minutes and standard deviation σ = 8.4 minutes. a simple random sample of 36 airline passengers is to be observed going through security. for the passengers in the srs, what is the approximate probability that the mean length of time for them to get through security will be less than 18 minutes?
Mathematics
1 answer:
gregori [183]3 years ago
8 0
A) The population and sample mean are always the same ... in this case, it is 20.6 minutes. 

<span>b) First convert the data to z-values: </span>

<span>P(X<18) = P(z < (18-20.6)/8.4) = P(z< -0.3095) </span>

<span>Now, using a Standard Normal table, look up z= -0.3095 </span>

<span>P(X<18) = 0.3785 </span>

<span>Hope that helps</span>
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The length of a rectangle is 59 inches greater than twice the width. If the diagonal is 2 inches more than the​ length, find the
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The question is asking us to find the dimensions of the rectangle, which would be the length and width. So, to find this, we must first state our givens, as it is Geometry.
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3 years ago
ACDF,BE is a mid segment what is x?
Ksenya-84 [330]

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X= 15

Step-by-step explanation:

the above equation will be used to determine the value of x.

the above equation will be used to determine the value of x.

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The answer is A my friend.

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