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sashaice [31]
2 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]2 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 hawk flew over the meadow and saw 60 mice he caught 18 of them what percent of the mice did he catch
Irina-Kira [14]

Answer:

18%

Step-by-step explanation:

So there is 60 mice and he caught 18.

Convert it to a fraction (ratio)

So the answer is 18% for this question.

Hope this helps.

5 0
2 years ago
Jorden drives to the store at 30 miles per hour. On her way home she averages only 20 miles per hour. If the total driving time
Trava [24]
For this case we have the following definition:
 d = v * t&#10;
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 d: distance
 v: speed
 t: time
 Clearing the time we have:
 t = d / v&#10;
 The total driving time takes half an hour:
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 Clearing d we have:
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she lives 18 miles far from the store
4 0
1 year ago
Read 2 more answers
Michaela pays her cell phone service provider $49.95 per month for 500 minutes. any additional minutes used cost $0.15 each. in
lilavasa [31]
75 extra minutes because $61.20-$49.95=$11.25 and $11.25/$0.15=75.
7 0
2 years ago
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Let p: x=4 let q:y=-2
ICE Princess25 [194]

Question:

Let p: x = 4 Let q: y = −2 Which represents "If x = 4, then y = −2”? p ∨ q p ∧ q p → q p ↔ q

Answer:

Option c: p → q

Explanation:

Option a: p ∨ q

p ∨ q means that either p is true or q is true or both are true.

Hence, Option a is not the correct answer.

Option b: p ∧ q

p ∧ q means that both p and q are true.

Hence, Option b is not the correct answer.

Option c: p → q

p → q means that if p is true, then q is also true.

Hence, Option c is the correct answer.

Option d: p ↔ q

p ↔ q means that if p is true, then q is true. If q is true, then p is true.

Hence, Option d is not the correct answer.

Thus, p → q is the correct option.

6 0
1 year ago
Anyone know the answer??
olga_2 [115]
No. no i do not so yeah.
5 0
1 year ago
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