The time it takes a printer to print a job is an Exponential random variable with the expectation of 12 seconds. You send a job
1 answer:
Answer:
0.8753
Step-by-step explanation:
Calculate the probability that your job will be ready before 10.01 am
Here, the parameter of an Exponential is E(X)=12
Now, to calculate the third job probability, it follows Poisson Distribution with parameter 1/λ
Therefore, E(Y) =1/12
Here, The third job will be ready for 10:01 AM, then E(Y)=61/12
Therefore, the required probability is
=1- POISSON(3,5,true)
=1-0.1246
=0.8753
You might be interested in
X - Jack's age
y - Susan's age
Jack is 27 years older than Susan.
In 5 years he will be 4 times as old as she is.
The system of equations:
Jack is 31 years old and Susan is 4 years old.
y - Susan's age
Jack is 27 years older than Susan.
In 5 years he will be 4 times as old as she is.
The system of equations:
Jack is 31 years old and Susan is 4 years old.
Answer:
a) 98% confidence interval for the true mean checking account balance for local customers.
(453.586 , 874.693)
b) 95% confidence interval for the standard deviation.
(214.91 , 441.53)
Step-by-step explanation:
Given a size of sample 'n' =14
given mean of the sample x⁻ = $664.14
standard deviation of the sample 'S' = $297.29.
a)
<u>98% of confidence intervals</u>
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The degrees of freedom γ=n-1 =14-1 =13
t₁₃ = 2.650 at 98% of confidence level of signification.
on calculation, we get
(664.14-210.553 , 664.14+210.553)
(453.586 , 874.693)
98% confidence interval for the true mean checking account balance for local customers.
(453.586 , 874.693)
<u>95% of confidence intervals</u>
The degrees of freedom γ=n-1 =14-1 =13
X^2_{0.05,13} =22.36 (check table)
X^2_{0.95,13} = 5.892 (check table)
(214.91 , 441.53)
95% confidence interval for the standard deviation.
(214.91 , 441.53)
