Question

a school bus driver decides to record the times of each of the 8 red lights...

a school bus driver decides to record the times of each of the 8 red lights on his route. this sample of 8 traffic lights has a mean of X=21.5 seconds, with a population standard deviation is 3.9 seconds. Calculate the margin of error, E, for a 99% confidence level.
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Margine of error = 3.552

Dear student,
I am waiting for your feedback. I have given my 100% to solve your queries. If you satisfied with my answer then please please like this.
Thank You

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Suppose the time a child spends waiting for the bus at the school bus stop each...
Suppose the time a child spends waiting for the bus at the school bus stop each day is exponentially distributed with a mean of 2 minutes. Suppose waiting times for the bus are independent each day. If we look at two days, determine the probability that the child must wait at most 5 minutes for the bus each of the two days. a. 0.9180 b. 0.8426 c. 0.0821 d. 0.2821 e. 0.4179 A sample of 33 boxes of cereal has...
Let the following sample of 8 observations be drawn from a normal population with unknown mean...
Let the following sample of 8 observations be drawn from a normal population with unknown mean and standard deviation: 16, 26, 20, 14, 23, 10, 12, 29. [You may find it useful to reference the t table.] a. Calculate the sample mean and the sample standard deviation. (Round intermediate calculations to at least 4 decimal places. Round "Sample mean" to 3 decimal places and "Sample standard deviation" to 2 decimal places.) b. Construct the 95% confidence interval for the population...
A random sample of n = 22 school children yielded the following data on their weight...
A random sample of n = 22 school children yielded the following data on their weight (lbs). sample mean: and sample standard deviation: s = 11. At a confidence level of 94%, calculate the margin of error in the estimate of the mean weight of this population of school children.
A random sample of n = 19 school children yielded the following data on their weight...
A random sample of n = 19 school children yielded the following data on their weight (lbs). sample mean: and sample standard deviation: s = 13. At a confidence level of 88%, calculate the margin of error in the estimate of the mean weight of this population of school children.
A hospital administrator hoping to improve wait times decides to estimate the average emergency room waiting...
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...
According to a previous study, check out times at a supermarket are between 2 to 7...
According to a previous study, check out times at a supermarket are between 2 to 7 minutes (120 to 8400 seconds.) A survey involving a random sample of customers of the supermarket is planned and the first order of business is to decide on an appropriate sample size. The 95% level of confidence will be used. (4 points) What is the planning value for the population standard deviation to be used in the sample size formula for estimating the population...
The state test scores for 12randomly selected high school seniors are shown on the right. Assume...
The state test scores for 12randomly selected high school seniors are shown on the right. Assume the population is normally distributed. 2.5              3.5                2.8 2.0              0.7                4.0 2.3              1.2                3.7 0.2              2.1                3.2 A-Find the sample mean B-Find sample standard deviation Round to one decimal place as​ needed. C-To find a 99% confidence interval for the population​ mean, first determine whether the​ t-distribution or the normal distribution should be used in constructing the interval. Refer to the flowchart below. ​1)...
In the Star and Tribune newspaper, there is an article entitled “1 in 8 school buses...
In the Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests.”   The article says that the overall statewide proportion of school buses that fail safety tests is 9%. However, one bus company has a higher rate of over 12%. Assume that we want a new estimate for the statewide proportion of school buses that fail the safety inspection. We take a sample of 200 buses and find that 20 buses fail the safety...
There are two traffic lights on a commuter's route to and from work. Let X1 be...
There are two traffic lights on a commuter's route to and from work. Let X1 be the number of lights at which the commuter must stop on his way to work, and X2 be the number of lights at which he must stop when returning from work. Suppose that these two variables are independent, each with the pmf given in the accompanying table (so X1, X2 is a random sample of size n = 2). x1 0 1 2 μ...
A sample size of 26 is taken from a normal distribution and a confidence interval is...
A sample size of 26 is taken from a normal distribution and a confidence interval is constructed. The sample mean is 61 and the population standard deviation is σ = 18. Using a 99% confidence level, find the margin of error, E.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT