Question
In: Statistics and Probability
Suppose that you want to estimate the number of miles driven per year among all drivers...
Suppose that you want to estimate the number of miles driven per year among all drivers living in Vermont and how the number of miles driven is related to a driver’s age. Suppose that you obtain a list of all drivers licensed by the State of Vermont, then take a simple random sample of 1000 drivers from the list and ask them to complete a survey regarding their driving habits during the last year and their age. A total of 620 people complete the survey.
- Identify the population, sampling frame, sample, and sample size.
- List two ways that sampling bias may have been introduced.
- Would you consider this to be a cross-sectional study or a longitudinal study? Explain your reasoning.
Solutions
orchestra answered 2 years agoRelated Solutions
Suppose that you want to estimate the number of miles driven per year among all drivers...
Suppose that you want to estimate the number of miles driven per
year among all drivers living in Vermont and how the number of
miles driven is related to a driver’s age. Suppose that you obtain
a list of all drivers licensed by the State of Vermont, then take a
simple random sample of 1000 drivers from the list and ask them to
complete a survey regarding their driving habits during the last
year and their age. A total of...
Miles driven by millennials. In 2009, the number of miles driven per year by persons aged...
Miles driven by millennials. In 2009, the number of miles driven
per year by persons aged 16–34 was 7,900. Assume that the number of
miles driven was decreasing by 300 miles per year.
a. Model this information with a linear equation.
b. Use this model to predict how many miles persons aged 16–34
will drive per year in 2019.
c. Explain why this model would not be expected to hold in
2030.
Suppose that the average number of miles driven by a CSULA students is 15,000 and the...
Suppose that the average number of miles driven by a CSULA
students is 15,000 and the standard error is 5000 miles. Find the
interval of miles within which 99% of the drivers fall.
Please show all your work
Suppose that you want to estimate the mean time it takes drivers to react following the...
Suppose that you want to estimate the mean time it takes drivers
to react following the application of brakes by the driver in front
of them. You take a sample of reaction time measurements and
compute their mean to be 2.5 seconds and their standard deviation
to be 0.4 seconds. For each of the following sampling scenarios,
determine which test statistic is appropriate to use when making
inference statements about the population mean.
Sampling Scenario
Z
t
could use either...
Suppose you want to estimate the average mpg for cars being driven from campus to the...
Suppose you want to estimate the average mpg for cars being
driven from campus to the Brass Rail. You sample a few of cars. The
average mpg in your sample is 22, and the standard deviation is 10.
If you want the error of the confidence interval to be no greater
than 0.3 and to be 90% likely to contain the true population mean,
how many cars should you randomly sample?
Group of answer choices
A)about 3,007 cars
B)about 9,112...
It is necessary for an automobile producer to estimate the number of miles per gallon (mpg)...
It is necessary for an automobile producer to estimate
the number of miles per gallon (mpg) achieved by its cars. Suppose
that the sample mean for a random sample of 5050 cars is 30.630.6
mpg and assume the standard deviation is 3.63.6 mpg. Now suppose
the car producer wants to test the hypothesis that μμ, the mean
number of miles per gallon, is 31.631.6 against the alternative
hypothesis that it is not 31.631.6. Conduct a test using a
significance level...
It is necessary for an automobile producer to estimate the number of miles per gallon (mpg)...
It is necessary for an automobile producer to estimate
the number of miles per gallon (mpg) achieved by its cars. Suppose
that the sample mean for a random sample of 5050 cars is 30.630.6
mpg and assume the standard deviation is 3.63.6 mpg. Now suppose
the car producer wants to test the hypothesis that μμ, the mean
number of miles per gallon, is 31.631.6 against the alternative
hypothesis that it is not 31.631.6. Conduct a test using a
significance level...
Suppose that you are interested in estimating the average number of miles per gallon of gasoline...
Suppose that you are interested in estimating the average number
of miles per gallon of gasoline your car can get. You calculate the
miles per gallon for each of the next twenty-five times you fill
the tank. Suppose that in truth, the values for your car are
bell-shaped, with a mean of 20 miles per gallon and a standard
deviation of 1. Find the possible sample means you are likely to
get based on your sample of twenty-five observations. Consider...
the average annual miles driven per vehicle in the United States is 11.1 thousand miles, with...
the average annual miles driven per vehicle in the United States
is 11.1 thousand miles, with σ ≈ 600 miles. Suppose that a random
sample of 36 vehicles owned by residents of Chicago showed that the
average mileage driven last year was 10.8 thousand miles. Does this
indicate that the average miles driven per vehicle in Chicago is
different from the national average? Use a 5% level of
significance.
a. State the null and alternative hypotheses ?0: ?1:
b.What calculator...
Suppose you want to study the effects of the number of students per classroom in algebra...
Suppose you want to study the effects of the number of students
per classroom in algebra courses and students’ performance in
algebra courses for high schools in Kansas. You collected a random
sample and now you have data for the above two variables. You
called them as number students (which refers to the number of
students per classroom in algebra courses), and students
performance (which refers to the students’ performance in algebra
courses - measured as their final grade in...
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