The answer of the question is 75
Using the z-distribution, it is found that 3,007 passengers must be surveyed.
<h3>What is a confidence interval of proportions?</h3>
A confidence interval of proportions is given by:
In which:
- is the sample proportion.
The margin of error is given by:
In this problem, we have a 90% confidence level, hence, z is the value of Z that has a p-value of , so the critical value is z = 1.645.
In this problem, we desired a margin of error of M = 0.015, with no prior estimate, hence , then we solve for n to find the minimum sample size.
n = 3007.
More can be learned about the z-distribution at brainly.com/question/25890103
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Answer:
Step-by-step explanation:
You need to subtract the coefficients to get the answer.
Let's look at the equation...
The coefficient is 3 and 1
So, you do 3-1
You get 2
So...
Answer:
The number is 53.
Step-by-step explanation:
If the digits are x and y where x is the first digit then we have the equations:
x + y = 8.........(1)
10x + y - (10y + x) = 18
9x - 9y = 18
Dividing through by 9:
x - y = 2..........(2)
Adding (1) and (2):
2x = 10
x = 5
and y = 8 - 5 = 3.
Answer:
It is positive because negatives cancel out each other
Step-by-step explanation: