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Mariana [72]
3 years ago
15

The waiting times between a subway departure schedule and the arrival of a passenger are uniformly distributed between and minut

es. Find the probability that a randomly selected passenger has a waiting time minutes.Find the probability that a randomly selected passenger has a waiting time minutes.
Mathematics
1 answer:
Paraphin [41]3 years ago
3 0

Answer:

Incomplete question, but the concepts of the uniform distribution needed to solve this question are given here.

Step-by-step explanation:

Uniform probability distribution:

An uniform distribution has two bounds, a and b.

The probability of finding a value of at lower than x is:

P(X < x) = \frac{x - a}{b - a}

The probability of finding a value between c and d is:

P(c \leq X \leq d) = \frac{d - c}{b - a}

The probability of finding a value above x is:

P(X > x) = \frac{b - x}{b - a}

The waiting times between a subway departure schedule and the arrival of a passenger are uniformly distributed between a and b minutes.

From here, we get the values of a(smallest value) and b(highest value).

Question of the probabilities:

In the two probability questions, you will get the value of x, and will apply one of the three formulas given above, depending on the question, to find the desired probability.

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Alex73 [517]

Answer:  x= -63/4, 15 3/4 or 15.75 in decimal form

Step-by-step explanation: Symbolab is a good calculator

5 0
3 years ago
Find the values of x and y leave answers in simplest radical form. *The altitude is:
jok3333 [9.3K]

x =  \sqrt{ { \sqrt{18} }^{2} +  {2}^{2}  }  =  \sqrt{18 + 4}  =  \sqrt{22}  \\ y =  \sqrt{ { \sqrt{18} }^{2}  +  {9}^{2} }  =  \sqrt{18 + 81}  =  \sqrt{99}  =  3\sqrt{11}

5 0
4 years ago
(3x-70) <br> (3y+40)<br> 120<br> x
Andru [333]
(3y+40)+(3x-70)=180

3y+3x-30=180
3y+3x=210
3(y+x)=210
y+x=70
x=70-y

meanwhile 180-120=x therefore x=60
therefore
60=70-y y=10
so x=60 y=10
8 0
3 years ago
Plz do have mercy and help me
Nikitich [7]
I have mercy:

8x and 9x+5 (the angles) form a right angle so 8x+9x+5=90 which means x is 5 and plugging it back into the angles 8x we get 40 sinceBHR and angle 8x are vertical angles they are equal to each other and so it's equal to 40
4 0
3 years ago
A researcher reports the following confidence interval for a comparison of the difference between two groups: 95% CI −12.0 [−30.
Lapatulllka [165]

Answer:

Decision: Support the null hypothesis.

Sample mean: -12

Step-by-step explanation:

Hello!

When deciding with a Confidence interval you have to keep in mind that the following conditions are met:

  • The hypothesis and the interval are made for the same parameter.
  • The hypothesis should be two-tailed.
  • The interval and the test have to have complementary confidence and signification levels. This means that if the interval is made with 1 - α= 0.95 the hypothesis test should be made with α= 0.05.

H₀: μ₁ - μ₂= 0

H₁: μ₁ - μ₂≠ 0

α: 0.05

If the interval contains the cero, it means that there is no difference between the means, so you support the null hypothesis.

If the interval doesn't contain the cero, there is a difference between the two means, so you reject the null hypothesis.

The intervals to estimate the population mean have the following structure:

Estimator ± Margin of error

This means that the sample mean (point estimate of the population mean) is in the middle of the calculated interval. To know it's the value you have to do a simple calculation:

sample mean: \frac{Upper bound + Lower bound}{2}

sample mean: \frac{6 + (-30)}{2}

sample mean: -12

I hope it helps!

7 0
4 years ago
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