Question

A traffic flow engineer needs to estimate the average time between vehicles passing a particular point on the road; they know that times between vehicles follow an Exponential distribution. Having waited for 457.12 minutes, a total of 191 vehicles are counted. Produce a 95% confidence interval for the average time between vehicles (in minutes)

Answer #1

In the case of Exponential distribution, the mean and standard deviations are equal.

Here the sample mean is ans sample standard deviation is . The sample size is .

The confidence interval for true mean based on the sample mean is

A 95% confidence interval for the average time between vehicles (in minutes)

18) A study is being conducted to estimate the traffic between
two destinations. In sample of 12 cars, the average time spent was
x ¯ = 48.2 minutes with a population standard deviation of σ =2.0
days. What is the margin of error for a 95% confidence interval for
μ, the true average time spent in the hospital for this population?
Round your answer to 3 decimal places.

Question 6 (1 point)
Suppose you are a civil engineer, specializing in traffic volume
control for the City of Grand Rapids. Your department has been
receiving a multitude of complaints about traffic wait times for a
certain intersection in the heart of downtown. To see if these
claims are valid, you want to monitor the true average wait time at
that intersection. Over the course of a few months, you record the
average number of minutes a car waits at...

Suppose you are a civil engineer, specializing in traffic volume
control for the City of Birmingham. Your department has been
receiving a multitude of complaints about traffic wait times for a
certain intersection in the heart of downtown. To see if these
claims are valid, you want to monitor the true average wait time at
that intersection. Over the course of a few months, you record the
average number of minutes a car waits at the intersection between
4:00 PM...

Suppose you are a civil engineer, specializing in traffic volume
control for the City of Grand Rapids. Your department has been
receiving a multitude of complaints about traffic wait times for a
certain intersection in the heart of downtown. To see if these
claims are valid, you want to monitor the true average wait time at
that intersection. Over the course of a few months, you record the
average number of minutes a car waits at the intersection between
4:00...

Suppose you are a civil engineer, specializing in traffic volume
control for the City of Grand Rapids. Your department has been
receiving a multitude of complaints about traffic wait times for a
certain intersection in the heart of downtown. To see if these
claims are valid, you want to monitor the true average wait time at
that intersection. Over the course of a few months, you record the
average number of minutes a car waits at the intersection between
4:00...

Suppose you are a civil engineer, specializing in traffic volume
control for the City of Grand Rapids. Your department has been
receiving a multitude of complaints about traffic wait times for a
certain intersection in the heart of downtown. To see if these
claims are valid, you want to monitor the true average wait time at
that intersection. Over the course of a few months, you record the
average number of minutes a car waits at the intersection between
4:00...

A hospital administrator hoping to improve wait times decides to
estimate the average emergency room waiting time at her hospital.
She collects a simple random sample of 64 patients and determines
the time (in minutes) between when they checked in to the ER until
they were first seen by a doctor. A 95% confidence interval based
on this sample is (128 minutes, 147 minutes), which is based on the
normal model for the mean.
Determine if the following statement is...

PART I
Internet speeds are a heavily advertised selling point of
Internet Service Providers. You notice that although you are paying
for a certain speed, the true speed seems to vary depending on
where you are in your house. In order to estimate the true average
speed you are getting in your house, you go to 12 random spots
around your house and record the speed (in MBs per second) shown
from a test at 'www.speedtest.net'. You see that the...

9.) How many commuters must be randomly selected to estimate the
mean driving time of Chicago commuters? We want 95% confidence that
the sample mean is within 3 minutes of the population mean, and the
population standard deviation is known to be 12 minutes.
A. 61 commuters
B. 8 commuters
C. 62 commuters
D. 7 commuters
10.) If we increase our sample size the width of the confidence
interval will
A. increase
B. stay the same
C. decrease
11.) Data...

A customer wants to estimate the average delivery time of a
pizza from the local pizza parlor. The customer wants to obtain a
sample mean that falls within 3.212 minutes of the true average
delivery time with 90% confidence. If the customer knows the
standard deviation of the delivery times of all pizzas is 11.959,
how many pizzas will need to be ordered?
Question 6 options:
1)
We do not have enough information to answer this question since
we were...

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