Question

Show all work How many commuters must be randomly selected to estimate the mean driving time...

Show all work

How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 90% confidence that the sample mean is within 4 minutes of the population mean, and the population standard deviation is known to be 12 minutes.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

The sample size obtained is in fraction hence we take either 24 or 25 by rounding to nearset integer.

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
A. How many commuters must be randomly selected to estimate the mean driving time of Chicago...
A. How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 90% confidence that the sample mean is within 4 minutes of the population mean, and the population standard deviation is known to be 12 minutes. B. The health of employees is monitored by periodically weighing them in. A sample of 54 employees has a mean weight of 183.9 lb. Assuming that σ is known to be 121.2 lb, create as 85%...
9.) How many commuters must be randomly selected to estimate the mean driving time of Chicago...
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...
Use the given information to find the minimum sample size required to estimate an unknown population...
Use the given information to find the minimum sample size required to estimate an unknown population mean . How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 98% confidence that the sample mean is within 3 minutes of the population mean, and the population standard deviation is known to be 8 minutes.
How many women must be randomly selected to estimate the mean weight of women in one...
How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 2.3lb of the population mean, and the population standard deviation is known to be 14 lb. 143 202 126 101
7. We want to estimate the mean amount of time people spend on Facebook each month.....
7. We want to estimate the mean amount of time people spend on Facebook each month.. How many randomly selected Facebook users must be surveyed if we want the sample mean to be in error by no more than 15 minutes, with a 95% confidence? A preliminary study suggests that the population standard deviation is 210 minutes.
Assume that we want to estimate the mean IQ score for the population of statistics students....
Assume that we want to estimate the mean IQ score for the population of statistics students. How many students must be randomly selected for IQ tests if we want 90% confidence that the sample mean is within 4 IQ points of the population mean and the population standard deviation o = 15?
How many business students must be randomly selected to estimate the percentage of using a laptop?...
How many business students must be randomly selected to estimate the percentage of using a laptop? We want 91% confidence that the same percentage is within three percentage points of the population percentage?
Use the given information to find the minimum sample size required to estimate an unknown population...
Use the given information to find the minimum sample size required to estimate an unknown population mean μ. How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 2.0 lb of the population mean, and the population standard deviation is known to be 27 lb.
Use the given information to find the minimum sample size required to estimate an unknown population...
Use the given information to find the minimum sample size required to estimate an unknown population mean μ. How many students must be randomly selected to estimate the mean weekly earnings of students at one college? We want 95% confidence that the sample mean is within $5 of the population mean, and the population standard deviation is known to be $60.
You want to estimate the mean amount of time internet users spend on Facebook each month....
You want to estimate the mean amount of time internet users spend on Facebook each month. How many internet users must be surveyed to be 90% confident that your sample mean is within 10 minutes of the population mean? Use 210 minutes as an estimate of the population standard deviation. Please be detailed and thorough!!
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT