Question

The amount of time travellers at an airport spend with customs officers has a mean of  μ...

The amount of time travellers at an airport spend with customs officers has a mean of  μ =31 μ =31 seconds and a standard deviation of  σ =14 σ =14 seconds. For a random sample of 35 travellers, what is the probability that their mean time spent with customs officers will be:

a) Over 30 seconds?

b) Under 35 seconds?

c) Under 30 seconds or over 35 seconds?

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

Homework Answers

Answer #1

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
The amount of time a bank teller spends with each customer has a population mean μ=...
The amount of time a bank teller spends with each customer has a population mean μ= 3.10 and a standard deviation σ =0.40 minute. If you select a random sample of 20 customers REQUIRED What is the probability that the mean time spent per customer is at least 5 minutes? There is an 85% chance that the sample mean is below how many minutes? What assumption must you make in order to solve (a) and (b)? If you select a...
The amount of time that a customer spends waiting at an airport check-in counter (X) is...
The amount of time that a customer spends waiting at an airport check-in counter (X) is a random variable with mean 8.2 minutes and standard deviation 2.5 minutes. If a random sample of n = 30 customers were observed, then what is the probability that the sample average waiting time exceeds 9 minutes? Show your work.
12. In order to estimate the mean amount of time computer users spend on the internet...
12. In order to estimate the mean amount of time computer users spend on the internet each​ month, how many computer users must be surveyed in order to be 90​% confident that your sample mean is within 15 minutes of the population​ mean? Assume that the standard deviation of the population of monthly time spent on the internet is 211 min. What is a major obstacle to getting a good estimate of the population​ mean? Use technology to find the...
please show all work In order to estimate the mean amount of time computer users spend...
please show all work In order to estimate the mean amount of time computer users spend on the internet each month, how many users must be surveyed in order to be 90% confident that your sample mean is within 14 minutes of the population mean? Assume that the standard deviation of the population of monthly time spent on the internet is 206 min. Show all work The minimum sample size required is _________computer users.
The amount of time that a customer spends waiting at an airport check-in counter is a...
The amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.1 minutes and standard deviation 1.6 minutes. Suppose that a random sample of n=50 customers is observed. Find the probability that the average time waiting in line for these customers is (a) Less than 10 minutes (b) Between 5 and 10 minutes (c) Less than 6 minutes Round your answers to four decimal places (e.g. 0.9876).
It has been determined that the mean amount of time that computer science majors spend on...
It has been determined that the mean amount of time that computer science majors spend on homework each week is approximately normally distributed with a mean of 15.2 hours and standard deviation 3.1 hours. What is the probability that a randomly selected computer science major will spend more than 14.5 hours on homework in a given week?
1. A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose...
1. A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 933 people age 15 or​ older, the mean amount of time spent eating or drinking per day is 1.92 hours with a standard deviation of 0.58 hour. Determine and interpret a 99​% confidence interval for the mean amount of time Americans age 15 or older spend eating and drinking each day. 2. A simple random sample of size n...
A normal population has mean μ 30 = 31 and standard deviation σ= 7 (a) What...
A normal population has mean μ 30 = 31 and standard deviation σ= 7 (a) What proportion of the population is between 15 and 25? (b) What is the probability that a randomly chosen value will be between 25 and 35? Round the answers to at least four decimal places.
A random sample is selected from a population with mean μ = 100 and standard deviation...
A random sample is selected from a population with mean μ = 100 and standard deviation σ = 10. Determine the mean and standard deviation of the x sampling distribution for each of the following sample sizes. (Round the answers to three decimal places.) (a) n = 8 μ = σ = (b) n = 14 μ = σ = (c) n = 34 μ = σ = (d) n = 55 μ = σ = (f) n = 110...
6.20. A convenience store owner wants to know how long his customers spend browsing the store...
6.20. A convenience store owner wants to know how long his customers spend browsing the store before making a purchase. It is found that time spent is normally distributed with an average of μ = 5 minutes and a standard deviation of σ = 2.2 minutes. Using a random sample of 14 customers, what is the probability that a customer, on average, will spend less than 4 minutes browsing the store? 6.21. It is estimated that 66% of new businesses...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT